Kitzbühel is the bomb. Check out the Raintal double chairlift on the backside of Kitzbüheler Horn (it's across the valley from the rest of the resort). If you're looking for good freeride terrain, you won't be disappointed.
Here's a blog post I wrote on it: http://www.stone-snow.com/blog/?p=197
To be honest I haven't even seen the rest of the resort... that one chairlift is so sick, I never needed to go anywhere else.