Harlequin wrote:
I'm still waiting for SP1 so I can buy Vista.

That's silly. You'd make sense if you said "waiting for SP1 so I can install Vista", but there's nothing stopping you from buying Vista today. The price is certainly not going to change, and in fact you'll need to install Vista first to install SP1 anyway. Slipstream might be a reason, but it's not that much of a deal.