I spent a day in a pair of Burton Driver X's with some stiff Intuition liners and I'm satisfied so far. I think the liners are stiffer than the boots, at least at the cuffs. That said, you can probably get away with most any pair of boots as long as you can get a liner (likely a ski-oriented one) in there that has a suitable flex.
I like that I can apply forward pressure on the shins now without the the boots just folding.