Part with the Prizm 6T and DFX, keep the excellent IDX Pro, and pick up a excellent M6. Then you'll have two excellent detectors and thin out two maybe good units.
The Prizm 6T, like the Coin GT that replaced it, is an 'OK' coin hunting detector. It is easy-to-use and has enough features for most people who just want a simple coin hunting unit. However, you already had a good and simple coin hunting unit with the IDX Pro. The Prizm 6T did provide you with a back-lighted display, if you had a use for it, but the main benefit was it provided a very fast automated Ground Balance. The drawback was it has segmented Discrimination unlike the more fine-tune type of variable Discrimination on the IDX Pro. I prefer a variable, knob-set Disc. control.
The DFX was a step into the future of design technology, and I applaud those who bought one and liked it. I didn't, having owned four DFX's, as they never matched the performance I got from the many XLT's I have owned, and compared them side-by-side many times. For those who use an XLT or DFX or VX3 or V3i, and have figured out how best to milk the performance they want to have with two of three set programs they use, then maybe they are content with them.
However, let me share this with you. I have a few friends who have had the DFX. Two of them started with the DFX. One no longer has the DFX, but does have a Minelab Explorer II, Classic 5-ID, and a modified IDX Pro. I just got a call yesterday from another who bought a DFX in July of 2010. In January of 212 he got an IDX Pro, mounted the 5.3 BullsEye coil, and hasn't looked back! Had a better year with it than the prior 17 months with his DFX. He just made a straight trade of his DFX for an 'as-new' MXT Pro, and I'm sure he will really appreciate the two-detector set-up of the IDX Pro and MXT Pro.
Another had the DFX, tried to like the DFX for coin hunting, but just didn't feel 'comfortable' with it. Wanted knobs and simplicity, but while the IDX Pro could do that, he also wanted Coin Depth, VDI numbers, but still keep it simple. The answer? White's M6. i used to use my XLT for 'cruising' big open park areas, but I had the M6 and IDX Pro along that I used more often. I used the IDX Pro, or other Classic series model, for working the wood-chip playgrounds or hunting the really ugly nail infested sites. Yes, the M6 and MXT's can do that as well, but the Classic's do it better and quieter.
But for most any coin hunting task, the M6 is an excellent detector, to be sure. For years I would have a few detectors in my arsenal, to include an XLT, MXT, M6 and Classic series model. The M6 got grabbed for the bulk of my day-to-day coin hunting. Some have asked why, and I just tell them it's simple and it has the7-Tone audio ID. Then I qualify that by reminding folks that it is there, but I only use it occasionally. I prefer the single-tone audio most of the time. That changed after White's brought out the MXT Pro.
For me, the MXT Pro filled a few needs, such as having the 7-Tone audio ID of the M6 (s I parted with the M6), yet all the needed function of the basic MXT (so I sold my MXT), plus I really liked the Ground Grab feature, and especially the excellent Back-Lighted display because I hunt after dark a lot in town, but especially during the hot summer months when the desert ghost towns and other scorching sites get miserable during the high heat. I mainly hunt into the night, and through the night, so the display works fine.
A final reason is that sometimes I hunt in an All Metal mode (Prospecting), but mostly use this function in a seminar to show how and why things work. For many people, like my 41 year old son, the M6 is more than enough detector to handle all of their hunting needs. Like his Dad, his 95o stays mounted on a spare lower rod for a trip to the beach or another more open location. The 6
