I picked up an Assault last week. 3" Snowcheck model. Overall, I've got to say I am truly happy I went with the Assault over the RMK. First being the shock package, it is significantly better than even the RMK Clickers. That said, I will be throwing my KMOD under it when the turbo goes in. However, up front the ski shocks make a big difference. The other thing I like, but wasn't sure of was ski width. I ran my Pro's at 39", and am running the Axys at 40" (narrowest for the Assault). To me, it feels very similar stance wise, and I am having no issues in the trees. Also, I think the tube A-Arms, are quite a bit stronger than the forged from the stories I am seeing/hearing.
Otherwise, the RMK and Assaults are virtually identical spec.
All that said, I you are going to run aftermarket shocks and A-arms anyway, save a couple hundred bucks and buy the RMK. Eventually, I am probably going to go to a set of ZBroz 39" arms, and have my WE ski shocks shortened and revolved. They are a very capable shock, and that will be a significant savings over a set of Raptors/X-0's/ Evols.