You are looking for 2 different boards. Even though some fanboy will probably tell you "x" board will do it all there really is no board that will excell at both the things you want. You will end up with a board that is average at both. My advise is to look at last years boards on sale and buy 2.
I like to ride hard and fast, big carves, and living in New Zealand, I have a lot of steep ice to contend with. So whatever I get, it needs to hold really well at very high-speed in all conditions.
This board wants to be camber and stiff.
But I also love to play around on the hill, jibbing, buttering and spinning about.
This board wants to be rocker and soft.