I'm considering getting back in to boxing but I want to finally ditch my 32 bit Vista for 64 bit which leads to the question: should I go ahead and upgrade to Vista 64 or wait and go with Windows 7 64 bit?

Obviously I'd prefer to get going now but I don't want to pay for both upgrades and I'm willing to wait till the end of October for Windows 7 if it's the better way to go.

Thanks in advance for any advice.