I'd go with the AMD Athlon 64-bit 2.0 Ghz processor. I got the 2.2 Ghz AMD Athlon 64-bit with something like Intels hyper threading and it runs amazing! You can run it on any Windows type (32 bit or 64 bit). Very stable and reliable. Excelent processor
If you want a fast crash free comp. get the AMD Athlon 64-bit 2.0 Ghz processor.