Tbh I will prob go for an xt cassette, however I won't go for SRAM, mainly because I'm used to and prefer shimano and secondly xx is pretty much 50% more then xtr, and that stops me from trying it.
I don't like formula brakes, I had a bad set, and whilst I appreciate that I've only tried one set, I am a stubborn so and so.
Ibeam seat posts limits your saddle choices