I'm thinking of trying linux, which version would you recommend?
Might even use this wallpaper if I do.
I'd go for LinuxMint - it's not too far from a windowsy OS type experience, well supported and looks good!
Ubuntu is the other popular choice so check that out too - I don't really like the default Unity desktop but you might. You can see the Mac OS style dock on the LHS.
Both can be downloaded as a liveDVD/USB so you can try them out without doing a full install first.
Sorry for the thread hijack MrT!