I've had my AT Pro for a few years now... It sees regular, heavy use (8+ hour hunts) in very rugged terrain.
It is designed to be a high-end, middle class detector. I'd say that it is absolutely worthy of that title.
Aside from "coastal detecting", I'd find it hard to believe that it wouldn't perform to your satisfaction no matter what you hunt for - unless for some reason you went from regularly using a XP Deus or CTX 3030 or something maybe.
If your a gold-specific guy, get an AT Gold... Same benefits, but peaked for gold hunting performance. Don't be the guy who claims to be a hardcore, gold-only hunter - has a choice between the 2 - but somehow ends up going with the PRO instead of the GOLD and then b**ches a hole in the ground on the forums when it doesn't squeak and squeal exactly the way you want it to, haha.
I'm 29 so maybe that has something to do with it - but the stock 11" coil is great and i don't feel that it is nose-heavy/cumbersome to any type of negative extant even on hour 10 of an all-day outing... It is there, it has the expected heft, but if your not nursing a malady or "up there" in the years (or "experience", whichever term you prefer!) I'm sure you'll be just fine.
I do want to go on the record as openly admitting to being on the same bandwagon of those who claim that the 5x8 coil does feel almost nonexistent because it balances so well... Like everyone has said, it seems the AT Pro is just flat-out optimized to run that particular coil both in balance and performance. It is definitely money well spent and i'd wager you'll join the majority of us who practically never go back to the stock coil just on principle... Its the perfect solution in combining some of the advantage of a sniper coil and the larger coverage area offered by the stock coil.
Iron audio is the bread and butter of the machine... The waterproof rating lives up the the "AT" namesake.
Its completely understandable that your on the fence about it... I'm the same way and do so much research on equipment that after so many good reviews a single negative one can cause paranoia, haha. However, i'm confident enough to put my lowly endorsement on the AT PRO.
The hardest part is ripping off the proverbial bandaid... If you can get through that I'm sure you'll be satisfied with your choice!
Sounds like you might have a great Christmas, and lots of good hunts in the coming year!
~Tejaas~