I too am a little unimpressed by the information released so far on the max. The couple of videos available from testers really offer no insight on any depth increase potential in a way that could be compared to the AT pro. If there was a substantial difference , you would think they would make showing that a priority in the video.
I am starting to see the max as falling short of the expectations of an AT pro user who was looking for a significant performance advantage. The max has some cool features , but if its only true advantages are wireless and backlight ( the other improvements only useful in certain environments ) then the max's appeal is mainly to someone who was considering buying a pro or gold , and for just a tad more they could get a max. Many of us who already have the pro already have 99.9% of what the max has to offer.
Not to put the max down , it looks great and probably an awesome value for the price......its just not all that significant of a step up from the pro so when I do upgrade from the pro it unfortunately probably wont be a Garrett because they dont have anything significant to upgrade to. Their higher end machines are outdated and made obsolete by the AT series.