Sorry for bumping a 5 day old thread, but I have to concede to apoppin. I think I've probably been (re)converted to 120Hz thanks to troubleshooting my video cards.
They were always running hot and I never could figure out why, till it suddenly dawned on me the basics of video card operation when I was playing Dead Island. I was pushing 200-400 FPS on average with vsync off, but for some reason never connected the fact that those 200-400 frames were still being rendered, displayed or not. I hadn't played with vsync on for most games in years. Popped on vsync, cards ran quiet and cool again. But, on my IPS display, that made most games unplayable due to input lag, and during on/off testing that I became acutely aware of screen tearing, which now began to annoy me.
So, enter ye old 120Hz monitor and vsync. Combine the two, and I'm now wondering if I was drugged when I first tested the 120hz monitor. Even double-buffer locked at 60FPS, it's a huge difference. I managed to keep the viewing angles OK without much in the way of distortion, though I still am kinda bummed on the colors (lacking proper saturation,and some minor banding/dithering). Hopefully when I stick a Spyder on it that'll bring it more in line. Aside from that, the only complaint I really have is the not-so-great backlight bleed, which is a symptom of this particular model vice a 120Hz TN panel.