I have this model. I've been pretty happy with it for the most part.
120hz is key, regardless of the 3D.
Viewing angles don't matter so much to me since I sit in front of my computer.
The 3D works well - though if you have a logitech 5.1 or more speaker setup, be advised that mounting the center channel speaker on the monitor will likely block the IR for the glasses unless you slide it over to the side.
The contrast is decent, brightness is decent (though sometimes a little dark in 3D), but I do see a hint of light bleed in the corners, and contrast is definitely different in those regions. It is noticeable if you are looking for it, but not in normal use. Other than this one issue though, everything is good. Best monitor I've owned (admittedly, that's not saying much).