Hey Guys! Gonna be building a hardtail in the next couple months. Put a parts list together. Wanted to get some feedback. And any advice on saving some weight. Here's the list. I know some things are missing but got all the big stuff. What do you guys think for rotors?

Felt Nine C Frameset
Rockshock SID XX Worldcup Fork
Sram XX1 Groupset
2014 Shamano M987 XTR Brakes
Stans NoTubes ZTR Crest Wheelset
NewUltimate Carbon Evo Seatpost
Fizik Tundra 2 Braided Saddle or Tioga Spyder Saddle
NewUltimate Stem
NewUltimate Carbone Handlebar
Crank brothers Eggbeaters 11 pedals
Esi grips