I couldn't tell you what to put in it, that depends on what you want to use it for and what kind of budget you are under. However, when you do find some component you want, try using the advice here to get it cheap. I also recommend www.tigerdirect.com for cheap computer parts, although their selection is not that great, and www.compusa.com has rebates on all sorts of things, with new deals every week, so I'd watch them. Be sure to follow all saftey precautions when installing new parts in your box, such as grounding yourself before futsing around!