Oh, also the lower shimano parts are great. It completely depends how hard you will let the bike work for you. If you use it mostly on the road, they will be great. Although i would choose either a real race bike or would go for a single speed, that saves you a lot of money for one of the most important and expensive parts. No more derrailleurs. Maybe just keep the front one and thats not the expensive one.

I thought i needed the XTR stuff, because i was going to take it to the beach and the woods. Rough terrain. Well XT would be good enough,and i think even cheaper ones would survive me.
Its mostly marketing what we fall for