I have the 2011 NPX 6/5/4/ Hooded suit as well.http://www.npxwetsuits.com/index.php?op ... &Itemid=85
I normally get cold very easy.
This NPX suit is super warm. Was out yesterday in 44 degrees and I was totally warm, not even a bit of a chill. The suit is so warm that I will give you a warning that there were a couple times I've used the suit in lower to mid-fifties temps and I've somewhat over-heated enough to come in off the water and put on a "colder" wet suit.
I've been "flushed" a few times with the suit. The flush was in the front neck area, seems like there could be a minor tweak in the design to help prevent that. Pretty much impossible to get a back flush with the hood. I've wondered if a front zip suit would stop this from happening, but I've never used one.
If looking for the warmest suit possible, you can't do better that a suit like this "wind" suit with smooth skin to minimize getting chilled due to evaporation. However the other suits with cloth on the outside may be a bit more durable.
If I had to replace the suit today it would be a difficult choice between the same suit or, to try a suit with a front zip to minimize ANY flushing. So far I'm not aware of a front zip suit that is predominately smooth skin, and that would make the choice really difficult.
So I'll leave with a question. If you have a front zip suit with a hood, can you still get "flushed"?