I've just bought Flow NX-AT bindings. I really like them but a lot of people are scared of using them as they work differently to every other binding on the market... I got them off ebay australia cheap towards the end of last year.
That said you cant really go wrong with Cartels, P1s etc. I wouldn't go anything cheaper in their range though, a friend of mine snapped a Burton Mission binding in half last year.
The problem with Burton gear is that the online stores in the USA won't send burton gear to Australia, so you are stuck paying through the nose in Aus stores. Burton cartels are about US$120 but they sell for over $300 in australia, I dont see how that works.