Man, read some theory first, for example there - http://asia.cnet.com/240hz-lcd-tvs-what … 054368.htm
I doubt one could see any difference between real 120Hz interpolation and that 600Hz sub-field thing.
But I don't know for sure
Would you know if these 200,240hz ect still refresh at 60hz
I don't know, the best idea is to read the TV's manual to see supported video modes from PC.