I agree with Don Nagual. It's a whole lot easier to find what's wrong with your computer if you made it.
You know, it's funny, 7 months ago, I would have never dreamed of building my own computer. I barely wanted to insall ram in our HP. But now, I've built my own system, and love working with comp hardware. In fact, I'm hoping to get a job in a computer services store this month! I love it!