I am not passing judgement on the new Matrix M6 until I put one in my hands and work it in the field. The do a little side-by-side to see if it is worthy to replace anything in my arsenal.
It looks like your post was a cut-and-paste announcement from White's so the following is certainly NOT MEANT as anything negative toward you personally., Just a little idea how I reflect on such pre-release and/or first announcement comments as they are stated:
"Introducing the new Whites Matrix M6!"... Is this a true
released introduction, or one of those
'hey, here's what we might have coming so don't buy the competitor's stuff until we have time to get this on the market' types of statement?
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"We are pleased to announce the introduction of the new Matrix M6!
Just in time for the holiday selling season,...".. Dos that mean it has been field tested a great deal and we've firmed up our final production version and it is now coming out of production and being shipped, or, here is something we think might be about right but we're going to hurry it out there due to the Christmas shopping season and try to capture some holiday sales sort of releases?
"M6 is the right detector at the right price."... The "right detector at the right price" is really sort of vague.
"Perfect for all-around hunting, with superb depth and sensitivity."... Let's see, if there's now no "Relic" mode like the MXT and no "Prospecting" mode like the MXT, how does that make it an "all-around" hunting unit? Also "superb" depth and sensitivity would suggest to me, and many others, that it is better than most anything White's or their competition makes, and therefore comparable to similar-priced competition. or even higher-priced models if it is truly "superb" depth and sensitivity!
"M6 field reports are in, and they're impressive!"... No savvy reader will figure that yet unpublished "field reports" usually done by a handful of White's Dealers and Distributors who would like to generate some sales wouldn't be "impressive." I prefer the get-it-out-there and tell-it-like-it-is approach, similar to how Minelab introduced their new $699 X-Terra 50.
"RED CARPET DEALERS had some definite opinions! We listened. The results? M-6."... How many "Red Carpet Dealers" are there and then ask how many devoted end consumers who use them a lot and have opinions? Answer: Fewer Dealers than Consumers, so I would listen to many consumers as well.
"Ken White wanted to know if M6 was the replacement for XL-Pro--- did it perform as good? The answer --- M-6 is much easier to use, has much broader appeal, unquestioned performance PLUS a state of the art fast tracking system, and competitive pricing."... It says "easier to use" but is it as adjustable as the XL Pro?
How do they determine a "much broader appeal?" The XL Pro has a fully variable discrimination from all metal accept up to screwcap/zinc cent. The XL Pro has an excellent analog TID system. the XL Pro provides user-controlled adjustment of the Signal Balance (PreAmp Gain).
"Unquestioned performance?" Now, there's a bold statement because we ALL question the performance of every new detector on the market! We'll continue to question it until we work with a matrix M^ ourselves and know it's strengths and weaknesses.
"State of the art fast tracking system.".... That can be a good thing, or bad. I much prefer to hunt with Autotrac turned 'Off' or 'Locked' (if the 'lock' setting holds the GB setting).
" MXT-style display with contemporary decal."... MXT size housing and "contemporary" decal?
" 3-position trigger - Tone ID, Search, and Pinpoint."... Translated, you can hunt with Tone ID, without Tone ID, but there's no apparent 'conventional' All Metal mode.
" 7-Tone I.D."... Seven? Heck, the discontinued Classic ID & IDX Pro's had 8 segment discrimination and many users had wished for a simple improvement of the Classic series to add tone (eight of them) to compliment the 8 segments.
"The VDI ranges and the corresponding tones:
-95 = 57Hz
-94 to -4 = 128Hz
-5 to 7 = 145 Hz
8 to 26 = 182 Hz
27 to 49 = 259 Hz
50 to 70 = 411 Hz
70 to 95 = 900 Hz"... Head-scratching time!
If the VDI numbers are anything similar to the MXT, XLT and DFX, then the 1st of 7 tones is super low for what might be hot rock reject, maybe. Then the 2nd of 7 tones is for what is often also iron. the 3rd of 7 tones, from -5 to +7 might be some iron and very small foil. That leave 4 tones of 7 to cover the coin-hunters desired range of targets. The 7th of 7 tones looks like it lumps all copper pennies, clad & silver dimes, clad & silver quarters, clad & silver halves, and clad Ike, Susan B., Sacajawea, and silver dollars all into the same audio tone! It seems like 'Red Carpet Dealers' would hear consumer's desires to have a little better audio separation of some higher-end coinage?
Now I am not ruling out the Matrix M6 as a good detector, but just reading this before it ever gets in my hands sure leaves me wondering what it really might offer in performance.?. 
" True turn-on-and-go simplicity with 2 controls and a toggle switch - DISC control with easy-set labels."... Labels are not a good idea. Yes, many manufacturers have used them, but many have wisely just used numbers or lines to allow the user to learn the nest setting for their unit in their ground conditions. Too often a newcomer or even experienced hobbyist puts faith in a named setting when it just isn't going to happen in some bad ground.
" Full-range SENS control with recommended setting and indicators for hardware/software ramps."... "Hardware/software ramps" is vague and I, for one, certainly hope that doesn't mean the gain and target volume are tied together like in the MXT!
" Auto Trac. Automatic ground balancing system with Beach mode."... White's has had some very good autotracking circuitry in several models, to include the XL Pro this is supposed to replace so, one would expect it to be a well thought out tracking circuitry.
" New-style 9.5" Eclipse 950 search coil - compatible with all Eclipse accessory coils."... Looks a little goofy to me, but I seldom use a 950 coil anyway. Glad it uses the Eclipse series of coils and their after-market counterparts.
"Simple."... Seems to be.
"Proven."... Not in consumers hands yet, and that's where they have to prove their abilities!
"Competitive."... This too, will be seen. I know it has my interest, at least a little, and I never count a detector out until I have used it afield. As for 'competitive, I'll get one to use in the field against the XL Pro it is aimed at replacing, and a similar-priced Minelab X-Terra 50 and another unit or two.
"M6 has the features and performance to be the winner in the mid-price range."... We'll all see because we know that there are a lot of loyal White's users (I have two in my personal detector arsenal now) who have been awaiting a new model release and I am sure the forums will be flooded with comments. I would like to have read more specifics that described the functions and features rather than manufacturer-generated claims such as "perfect for all-around" use, "unquestioned performance" "proven" and other rather open and back-patting claims. Let the consumers tell it like it is, then we'll know.
Just a few thoughts.
Monte