I'm trying to build a decent home theater PC for my uncle. He is mainly going to stream TV channels from the middle east so I'm sure it shouldn't need too much power. I already have 2 2gb sticks of G.Skill ram and a Windows 7 OEM disc. I also have a few laptop hard drives lying around so if using that in place of a 3.5 inch HDD won't be a problem at all then I can also use those. He told me to keep it below $300 so I was thinking about these.
This totals at around $206 before tax and shipping. The tower will be in a somewhat closed area so I didn't want to get anything that will get too hot for no reason. He definitely won't be gaming on this PC, the most CPU taxing thing he might do is stream a movie from Netflix. I feel like this will be a good build for something simple, my biggest question is should I just use one of my 2.5 inch laptop hard drives or buy a new 3.5 inch hard drive. Is there much of a difference between the two? Any help will be appreciated.