Call HOLZ Racing Products for a set of Evols for the front. I have had them on my XP since 08 and anyone who rides my sled will tell you how amazing they ride. You like it ruff then the Evols will surely impress.
My buddy has floats on his Pro RMK and its light years better than stock WE shocks and great for most riding. The Evols shine in the woops. I'm no pro rider by any stretch. Even when I screw up and run out of talent in the woops my sled never bucks me off.
Setup is most important as anything on any shock. Make sure you call Matt and let him know what sled you have, how much you weigh, and what kind of riding you prefer. This will insure that you get valving and pressure settings correct from the statrt.
As far as rear if you can swing the Alpha X I would. Lots of set up options with the Evol on the rear for different riding conditions. It's my preference but buddies have easy rides and Timbers and they seem to work well also. Though I like the feel of mine for all out woop thrashing.
Good luck and enjoy.