My primary detectors were the the F19 and AT Max. Truthfully, from day one I didn't "love" the ATMax. Its sooo chatty, but if you exercise patience, you can find some stuff with it and it was my only detector with wireless headphones, which I really prefer. I mostly do coin shooting and still wanted something that was "faster and quieter," water proof, and still had wirelss headphones. I pre-ordered the the Makro MultiKruzer and the EQ800. After getting my MultiKruzer in February and April rolled around and I still didn't get my EQ800, I decided to cancel the EQ800 order. I sold my ATMAX, because I think the MultiKruzer is far superior for coin hunting and decided to get an EQ600 since those are becoming more "available."
I have only been out in my back yard with the EQ600 once, but something tells me after a few more outings, the F19 will be most likely be on the market soon. I don't plan on having less than two detectors will also probably keep my Fisher F44 around for "guests" since it is super easy to use and can deal with exposure to rain.
CS