boots: make damn sure they are comfy and that they KEEP YOUR HEELS DOWN!
bindings: not really all that important, but stiffer is better.
board: i'm a big fan of
donek, and
prior used to have great deals, but the weakening us dollar might make that not the case anymore. donek's freeride boards are really cheap, and have the same construction as their custom race boards (which are considered some of the best out there). you'll have to order directly from their website, but that really shouldn't be an issue. i havent ordered a board from them in a couple of seasons, but the owner used to answer any questions about the boards by email and was really knowledgeable and helpful.