What is the difference between the three and recommended for home theater use? I need something that can run a 70" TV (or smaller depending) and serve as a server for music and videos to be watched on the tv. Also I would like to know some different options like what a TV Tuner card does and that sort of stuff. I have chosen an A10, just need to know my options and what stays colder, a full/mid tower supporting ITX/ATX/MicroATX or an MiniITX case? Also lets say i did have cable, I make my computer record live tv? Is this legal even????