I've installed and tried out just about all of the other major Linux versions on my motley collection of ex-office computers, and openSuse gets my vote as the best all around choice. Other "spare" clunker computers here have Debian, Ubuntu, Fedora, etc, on them but openSuse is what's on the best 4 computers.
I have a Windows XP Home computer but don't even turn it on very often. There's a few things that some Windows software packages do better than the equivalent Linux packages, but not very many.
I don't have to bother with software firewalls and antivirus programs with Linux, where ALL my Windows boxes have been taken down and required a complete re-install at least once.
whoa dude.. I have the same config. quadcore cpu 2.8 ghz 4 gb ram with a one terabyt hd!it is beautiful! lol