I actually just demoed the Skunk Ape and had a lot of fun on it. I had a chance to ride it at Vail and Beaver Creek while I waited to find a Legacy to purchase. The Skunk Ape was great to mess around on, but I did not feel too stable on the btx. If I wasn't centered on the board I felt like I was going to slip out especially in the trees. It did ride well in the powder especially for a shorter board (157).
The Legacy is incredible and handles everything the Skunk Ape can just much better. It is far more stable, easier to press, carves better, and floats great. I got the Legacy in a 159 and at 6'1 and 180lbs I feel right at home on it. The only issues I have with the Legacy so far is getting used to going over moguls/powder mounds. The boards(like the Skunk Ape) wants to pop off of them rather then ride right through. I figure this is due to the rocker/btx in the boards. With more time on the board I am sure I will get used to it.
Simply, get the Legacy and don't look back.