Specifically, I want to know if I can run XT M770 cranks on a Truvativ GXP BB from a Stylo (2008) crankset?
Or does anyone know of another crankset that is cheaper than XT and comes in 180mm arms that will allow me to run the XT arms as well?
I want to use the Stylos on my Karate Monkey for commuting with a big ring and then put the XTs on for mountain biking. I don't want to have to change rings if I can help it.

thanks,
DT