I struggled with this very decision this past November. I went with the fly 9357. 0.5 lbs +/- is not woth $300 (not 200 as you said) to ME. But each of us is different. All XTR sure has appeal. It has a carbon crank which is an upgrade, but not one that I really wanted anyway. Brakes are the same. Wheels/tires are the same. Pro has a better seatpost I think.

I am happy with my decision. Both are great deals. That fork is flexy but I am fine with it. The tires are expensive light junk if you ask me. Just too little tread, protection and width. As soon as you put on real tires you will gain 1 lbs or more.