Unless you plan to game a lot, I would pick a Linux distro (Fedora, Ubuntu, Arch, whatever) and get the E17 desktop shell. Make the partition for Windows, then wait. If you end up needing Windows, get one. Otherwise, just leave the partition in place until 7 comes out, whenever that is.
You can’t run it on non-Apple hardware if you want to abide by Apple’s EULA…

