Agree with everything that's been said so far, will bring up some additional issues (I've skied nearly all of these):
1) Ice and crud. If you plan to use this as a day-in-day-out ski at Snowmass, yes, you'll confront ice, refrozen, crud. Of the skis mentioned, none are wonderful in heavy crud or carving hard groomed (these are all twins, y'know) but the Bridge is surprisingly good, and the Mojo 90 and Prophet 90 are nearly as good. BT's are just OK. The Gun is not. At all. Can't speak to the Atua/Misfit, but suspect it would be fine. In general, I've found that the Prophet and the BT's handle more like they're really park/freestyle skis that will handle groomed while softly grumbling, while Bridges and Mojos feel more like directional skis with a turned up tail.
2) Bumps/tight spaces. Yes, you also find these in Snowmass, beginning about an hour after the storm lets up and the crowds hit the powder. In order of best to worst: Gun, Mojo, Prophet, Bridge, BT, Atua. And in this case, best is excellent, worst is still better than most directional skis.
2) What you're really there for. If it's actually just powder, or waiting for a new storm, then go buy a pair of Guns and forget the rest. Really. If it's to learn to be a better skier on all surfaces, avoid Guns and BT's, think about the rest.
3 Speed. No twin is happy at real speed, but in order of which I'd want to hit north of 45 mph on: Bridge, Mojo, Atua/Misfit, then don't even think about it.
4) Your skill level. Of these the Gun is the most forgiving, followed by the the Prophet, then the Mojo, then I suspect the Atua, with the Bridge and the BT's least forgiving.
5) Price. Best deals right now on Prophets and Mojos. Worst on Bridges. Google the names or go to ebay and check it out.
6) Feel. You don't mention what you've been on, but keep in mind that each of these skis come from companies with characteristic brand feels to them. OK, you're about my size and wieght: For me, Heads are smooth, damp, and comparatively stiff, which makes them more reliable at higher speeds and in crud but not as buttery at lower speeds. Fischers tend to give you a lot of snow feedback, are light and lively, stiff further back for more kick at the end of the turn, can get knocked around a bit in crud. Volkls are damper, but still light and quick, and ask to carve. Lines are somewhere in the middle, stiff underfoot and soft at each end. The most park-like of these. Dynastars are smooth and durable but can be pushed around a bit in crud and are finicky about your balance point, also very park-ish.
All this said, hard to go wrong with three or four of these; you should be able to get one for under 3 bills. Good luck!