Truvativ Stylo 1.1 GXP Crankset 2013
Light for the climbs, responsive for the trails, strong and stiff for whatever else might come your way. Wider bars bring the heightened control you need, and updated graphics keep you looking good in the woods.
The crank, bb, and chainring should be the least of your concerns on the trail. Before, I had a stock 3x8 setup on my Specialized Hardrock. After several years I began to look at ways to cut down the weight of my ride while adding simplicity at the same time. I knew I did not need three front chainrings. Solution, 1x10 setup all the way. After a year and nearly 1000 miles on this piece I still have no complaints.