I just put Ohlins shock and Ohlins internals on the front. It is a massive upgrade. In the US, Ohlins is by far the most popular suspension and probably the best. You wont be dissappointed with the upgrade.
Street and Backup track- 2012 KTM 1190 RC8R- White and Orange, Dominator exhaust, Bazzaz with TC and QS, Ohlins suspension, Sato Rearsets, GBR race covers
Track- 2011 BMW S1000RR with ABS, TC, and Race Assist. BST Wheels, Shorai Battery, Full Akrapovic Exhaust, Bazzaz, Full Ohlins suspension, Vortex Rearsets, BMC Race Filter, Pazzo Racing Levers, Yoshimura Case Protectors, Stomp tank Pads, Puig Windscreen, Frame Sliders and Fender eliminator