remember that 60Hz "refresh rate" on a TFT is very different to 60Hz on a CRT. On a CRT it's about how fast the cathode ray gun re-draws the image on the screen and 60Hz and low frequencies can lead to eye strain and head aches. On a TFT, each pixel is refreshed individually and so it's the pixel response time which determines that 'refresh '. When it comes to using v-sync and talking about frame rates, that is where the 60Hz vs 75Hz conversation comes into play, but it's important to realise that most TFT's just scale a 75Hz input refresh down to 60Hz internally anyway and drop frames, so it doesnt really give you any benefit in most cases.
If you need a higher frame rate for high level gaming, you'd probably want to look at some of the true 120Hz models now out there