The Proto HD is awesome in the trees. Though I prefer the Evo over it because I'm usually messing around in there.
I think the HD would be right up your alley. Kills the groomers and is a lot of fun in the trees. As for jumping, it's my go-to board for that. The pop is excellent and everything from take-off to landing feels solid.
How is it in Pow? Yes I know it's a twin
Don't get a lot of pow days here (i think I've had one in four years of being a weekend warrior) but I'd still like to know if its something I can bring with me on Japan/USA trips, I won't be getting dropped off at the top of some Alaskan mountain or anything like that but would be nice to know whether my leg will be burning trying to get down the bottom after a big snow dump.