I've been very happy with my Maxxis Minion 2.7 super tacky up front, and with Maxxis High Roller 2.7 3c on the rear. The Minion rears aren't a scratch on the High Roller, massive disapointment actually
The super tackys are a bad idea for the rear unless you have a magic wallet. I got just 4 days out of one at N* before it was completely shot. I mean COMPLETELY shot to pieces. It was way past it's best after just 2 days and I'm not know for being one to drag on the brakes much, just a few hard braking points on most runs. The Maxxpro or 3c last ages on comparison, and there's not much difference in braking/grip between them. The fronts just seem to last forever for me in the super tacky.
I've also used the Conti Vertical Pros, they grip well but they are a little low on volume and the side walls are quite flimsy. It's really worth going for something with a large volume (2.5+) and some sidewall protection as there are some very jaggy rocks. IMHO if you are running more than 25psi then you really aren't getting anywhere near the maximum grip on the loose stuff. I run 18-20psi with the Maxxis tires and I can just about get away with the pinch flats, the grip is quite insane given the loose conditions.
The WTB Dissents are very popular up there this season and come very highly recommended, but I've yet to try them.