This topic is very interesting. This week I had the urge to build my first computer. I had a lot of parts around the house. I bought a case, MB, and heatsink/fan at New Egg since the price was right. I would like to see what you come up with. With my build I was doing it as cheap as possible. I have three computers using a modem so for some things speed it not my need. I would say know what you want the computer to do, follow the links others have recommended, and go from there. New Egg seemed to have a lot of good deals on memory right now.