I managed to knacker my rear mech last weekend, and I'm a bit confused by the range of rear mechs available. I have a 2x9 setup - can't remember the sizes offhand apart from I have a 36T 'big ring' on the front.
Ideally I'd like the shortest cage rear mech I can get away with. I think the short cage one of these was what I had before - http://www.merlincycles.com/bike-shop/mtb-parts/transmission-gears/derailleurs-rear-mtb/shimano-xt-m771-9-speed-rear-mech.html - should I just suck it up and buy another, or are SLX/Deore ones just as good?
Link me to the best/cheapest one please.