I've been on some setups from both sram and shimano for a while now so I figured I'd blather a bit about it.
But clutch derailleurs are rad.
http://blistergearreview.com/gear-reviews/shimano-xt-vs-sram-x9-clutch-derailleur-systems
But clutch derailleurs are rad.
http://blistergearreview.com/gear-reviews/shimano-xt-vs-sram-x9-clutch-derailleur-systems