I've got an ol' P3 and P4 machines which I intend on installing only retro emulators and its roms (and nothing else), so I was wondering which of these two OS would be the ideal one for it? It's worth noting that I'd possibly plan on using a USB controller so does Windows 2000 work fine recognising such a thing too? P.S.: I'm a console guy so gaming on PCs has never really been my forte. Thanks.