Yeah WinXP Home Edition is fine.
http://www.newegg.com/app/viewproductdesc.asp?description=37-102-151&DEPA=6
500 Watts is plenty. I've seen Athlon 64 systems on 350W power supplies. You should go for at least 400W though. The 500 is just fine, you can never have enough power especially if you want to add things to your computer in the future.
http://www.newegg.com/app/viewproductdesc.asp?description=37-102-151&DEPA=6
500 Watts is plenty. I've seen Athlon 64 systems on 350W power supplies. You should go for at least 400W though. The 500 is just fine, you can never have enough power especially if you want to add things to your computer in the future.