So I just a carbon XC frame from my boss, it was his old racing frame, its just been lying around so he had no use for it so now I have it. I am mainly a roadie, so I don't know a whole a ton about mtn biking, but I am familiar with all the brands, and I have working knowledge of all the parts. I have access to used components from the shop I work in. So I was planning on running all xtr, besides the crank. I'm not sure what I will do for that, probably used at first, and maybe upgrade in the next year, what size of chain rings would I want though? As for the fork I will most likely get a new rockshox reba since I can pick on up fairly cheap with my shop discount. I am trying to keep this a fairly cheap build though since I just dropped 2grand on a road bike. Any suggestion?