So, someone has offered to buy my laptop for $400. So I want to buy a new computer. I was thinking of bulding one. But first, I have a couple questions. Also, I'll have around $600 to spend, in total. 1. How hard is it? I've never done this before, and I don't want to mess it up. 2. Is it cheaper? I need to get enough RAM, a good graphics card, and good processing power, as I want to run newer games. Portal 2, Witcher 2, Call of Duty, just to name a few. 3. What's a good place to buy the parts? I'd like to get them from a cheap, but reputable shop. Thanks in advance for help guys! I really appreciate any and all help.