refresh rate not good enough
Refresh rates on LCDs doesn't matter. Response time does. Almost every LCD will support 60hz, and many support 75 for compatibility, but the key figure is the response times. This number indicates how long a pixel takes to go from black, to white, and back to black. It's measured in milliseconds, and less then 30 is excellent. Some sites may give a rise and fall number, indicating how long it took to rise to white, and fall back to black. Add those two together to get the total response time.
I am looking at a Samsung LCD right now with less then 25ms time. Thats pretty much the best time on the market right now, and should be unnoticeable in games. It may seem like a large amount of time, but most of the time a pixel is simply being bumped up a few shades of it's color, and not running the entire spectrum.