They can handle groomers and even icy slopes pretty well, thanks to torsional rigidity. Basically they feel pretty much like 06/07 Head mojo80s, not super stiff but still solid enough to handle hard pack and big speeds. You can do some real turns with them, if that's what you're looking for!
I haven't had a chance to ski pow with Kamasutras, but you'll probably survive as long as it isn't neck deep. They aren't that fat, but if you're going to get only one pair, Kamasutras could be a good choice.
07/08 Kamasutras look good imo