XP 7 2000 Ubuntu Kubuntu ArchLinux
Fival boot!!
Gotta question the logic of that though. Why even keep 2000? It was completely beat by XP, which is beat by 7 (ask any computer expert. Pretty much all of them now recommend 7, even those who skipped over vista). And why have 3 types of linux? Or at the very least, why Ubuntu and Kubuntu? Seems like you just want more to show off. Do you really use them all?
Pure for show yes

I dont use anything but Windows 7 now.. I got the hardware to run just about anything on the market right now..