The thing about HDMI to remember is that there is only two VERSIONS of it as of right now. Going into a store you will see ones that say 3D enabled and certain mhz and frequencies and shit. But there is only two speeds that HDMI is right now. As long as you buy the second generation then you will have the best HDMI there is. No matter for $50 - $100 for monster cables or $10 - $20 for after market HDMI cables. But the size of tv does matter for FPS. It isn't like sex, the smaller the better in this case.. Trust from experience
Except when it gets to small, then well.. Smaller isn't always better then.