I own a Thermaltake V3 (very similar to the V4) and I'm pretty satisfied. The Cooler Master case doesn't look too bad either.
It might just be me, but those two NZXT cases look kind of ugly (especially the Gamma). Wouldn't want to look at that every day.
Kind of a toss up between the Thermaltake and the Cooler Master. Try flipping a coin.
I flipped one for you, go for the V4.