***** XP was the greatest OS ever. *****
Loved XP too. Ran it for many years. Windows 7 Pro x64 is my all time favorite. I have a Windows 8.1 Pro OEM CD. Tried it for a few months but went back to W7.
In my opinion, that particular release is the best version of Windows ever, before or after, hands down.
Well, Ultimate x64 has a couple more bells and whistles... but Pro is a perfect match for everything I do on Windows.