ATNs are not well thought of by most folks here.
For that kind of $$, you could get a MUCH better scope.
A Weaver Grand Slam 6x20x40 would run rings 'round that thing in terms of brightness, clarity, and image quality, for $100 less.
I'm saying that w/o having seen that ATN scope...but unless they're building something completely different in terms of quality, I'd be leery of spending that kind of $$ on something that's unproven.
For a little less, you're looking at a Leupold Vari X 2 6x18x40. I doubt there is ANYONE on here that wouldn't take the Leupy over the ATN. Even a Burris Fullfield II in 6.5x20x50 with target knobs is cheaper than that ATN. Bushnell Elite 4200 is another great scope for less $$ than the ATN...a 4x16x40 is ony $418 at SWFA.
Seriously, for that kind of money, I wound't dream of getting the ATN with those other choices, period. YMMV, but that's my advice.
EDIT: There is a used 4300 Elite 4x16x40 for sale right now in the EE, on page 4, for $350 shipped. I'd take a look at it.