I have not tried the newest vesion of the flows. However I had the NXT-FSE, but was never satisfied with the fit. I could not get I tight enough without making it impossible to enter the binding... Boots were Flows Rift.
Now I have the Catek FR2 and Driver X, which I am very pleased with.
The Nidecker carbon ICT is also a nice binding, but I think the price is a little too high compared to the quality (I just broke one of their high-backs yesterday, so my judgement might be a little of :)