If you really are advanced, never ride switch and only carve on groomers, I say raptor. If you like to mess in the trees/pow, maybe the Cobra. Anything equal to or higher than the flex/dampening of the SL should meet your needs. You don't need to go super stiff unless you want to alpine carve it up.
Get the Raptor if you want to ride like this:
http://www.youtube.com/watch?v=l0hY1_OfGQ0