Just asking, isn't the frame rate 50/60 Hz too low for HD resolution? Look some sports and fast moves. is the picture OK? Are you missing something?

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Turbo51 - Free Pascal compiler for 8051

Yes it is too low and what your missing is smoothness, your experiencing lagging of content and also during some fast movements you will experience what I like to call pixelation. I would definitely recommend the 120 Hz screen. Everything will appear smoother and blur-free, you will find yourself seeing so much more than before -- I have personally experienced this and have been nothing short of impressed. It's actually incredible how much detail and subtle motion / interactions that game developers put into a game, that people never see.

If your country supports 120 Hz Thats the way to go..