walang problema sa frames madami kasing brand ng frames at style. depende nlng sa riding style mo kung ano kukunin mo na frame. T6061 yan lng isang klase ng material made para sa mga frames. Sa moving parts ka maginvest. Shimano commonly ung parts na gamit talaga. The heavier the part the cheaper.
Ung bike ko nasa mid range lng dinamn ganun kagara gamit ko lng for "bike to work" at exercise. you can compare sa parts na setup ko medyo mabigat kc setup ko pang cross country na downhill.
Frame: Venzo Fx3(for DH/ Freeride) pwede kahit anong frame na masmagaan pa.
Crank: Shimano Alivio ( kung may budget ka mag deore, xt, xtr etx ka para magaan)
Brake: Shimano non series( may kamahalan kc kung series na brakes mag series if u like at kung may budget)
Wheel/ Rim: DH Rim and 2.3 tires ( depende sa riding style mo mine is for downhill kc nasa baguio at puro trails and rough road dito)
Try mo din mag-google madami kang matutunan dun before buying or building a bike.