Happy Holidays!
7ducati, I preferred something else than Shimano too.And went for these http://www.hopetech.com/product/race-e4/ insteadWith a front 183mm rotor in front, and a rear 160mmMay be the 4 pistons are overkill for an XC bike, but they are very light.They provide plenty of stopping power while needed, and are very modulable.And since I messed up while mounting them, I know they are very easy to bleed.