Could talk lots about the spec’s and difference but this would seem the best way to talk you thgough them, taken from here http://www.tftunedshox.com/Catalogue/Shop-RockShox/RockShox/RockShox-2011-Forks-and-Shocks
Rev’s
Well, the best just keeps getting better. With more options on axles and with a new super-sweet tapered carbon crown/steerer on the World Cup model. Available without XX Pushloc this is a seriously nice Enduro fork for your 140-150mm travel bike. Dual Air is our pick, just choose your price point and you will have the best trail fork there is.
Sektor’s
What’s not to like really? We really liked the Pike, we really like the Revelation and this takes the best bits of both – the Revelation’s lightweight 150mm chassis and the simplicity of the U Turn system making a truly fantastic trail riding fork. Budget dampers keep the price down but remarkably don’t diminish the performance. Credit crunch hit? Need a great trail fork? Sektor is where it is at…
Reba’s aren’t mentioned, but it’s there the what you buy if you don’t want the lightweight SID’s, but don’t need the travel the Sektor’s/Rev’s offer.
After that it’s down to the options you need? …travel adjust, lightness, Damping system go Turnkey(basic)->motion control(very good)->Blackbox(the best from RS)