How about trying a Volkl 4 Star? It's not as stiff as the 5 Star and 6
Star. It has a 67mm waist, which isn't the best for powder, but won't
sink all the way to the bottom. Should be good for bumps and still do
well on the race course. Or if you want something a bit wider but
still fairly quick, check out the Volkl 7 24 series. Disclaimer: I
haven't had a chance to try any of these, but have yet to find anyone
skiing on them who didn't love them.