Yeah. I'm going to build a new rig. I don't know prices on OEM, so I don't know how much I'll have leftover to spend. I might just wait until my birthday to pile in the extra cash and then build it.
OEM is meant to be on one computer and cannot be transferred from an old system onto a new one (legally). Retail license can be uninstalled from one computer and put onto another computer.
Well I'll be building my own at the end of the year. 4GB of RAM. That's the only thing I'm for sure. Everything else I'll still decide, especially the processor. But I'll worry about that when I actually go and buy it.