I'm using a Magura Durin Marathon MD 120M (80-120mm) (1585g). Most of the time I'm in the 100mm or 120mm setting. The 120mm gives you a little more edge and stability on descents, especially with logs, small drops, etc. It doesn't impede climbing, if your body position's right.
If I was doing it over (or 'upgrading'), I'd go with the 2010 Fox 32 F120 FIT RLC fork at 1470g and forgo the travel adjust.
Cheers.