i dont want to be mean and call you out, but he did say he's planning on doing singletrack/technical singletrack in his OP, so just to answer the question for ya there....

i believe in my previous post i recommended some nice hand built wheels, and chelboed recommended some sweet Mavics due to, among other things, the the warranty. Either would be an excellent choice. I love my hand builts cause they're a) different than what other people have and b) i built them myself. One of my co-workers recently built up a Ventana with a set of crossmax wheels and they're very cool, and he really likes them.

Crankset wise we were discussing race face stuff, chelboed if you could pop in with your race face opinions they were good, I dont remember them all. We also mentioned that the Hollowtech II stuff from Shimano is an excellent value and quality. The XT set are pretty and, since they're silver, would match the frame very well .

And then the Shimano Vs Sram stuff... I'd say go and try both of them if you can. They do feel different to me, so playing with them and getting some help here with longevity is going to be your best bet (Unfortunately I only own 8spd Shimano stuff... but its holding up great!)

And yet again, that thing is AMAZINGLY cool... if only it was an XL...