What are you looking for in a binding? I have ridden some older (circa 2005) flows and some mid-quality two strap bindings (Head P4).
I sold the old 2005 Flow Amp5 bindings and have some 2010 Flow NXT-AT bindings on the way. The Amp5's were very so-so. Heavier than I would have liked and took 1 or 2 runs to set up properly. I have heard it said that you should either use Flow's high end stuff or not at all. Guess I will find out.
Rear entry bindings are more difficult to get back into if you are stuck in deep powder.