This is a follow on from this thread
http://www.bikeforums.net/showthread...oad-components where most of the questions have been answered.
With 10 speed, you can't mix 10 speed road and Dyna-Sys MTB; for RD capacity, from real world experience, an SS will take up to a 30t, a GS will take up to 32t, and an 9 speed Deore M5xx will go fine with a 36t