I will be ordering Windows 8 to get the low introductory price, but I don't plan to install it for a while. I really like Windows 7. I have the Windows 8 RTM version on another computer and I must say I'm not crazy about it. The Metro screen is ok, but I'm not comfortable navigating around it yet. It will take a while to get used to.
EDIT: I might change my mind on that. Apparently if you download Windows 8, but don't install it, you have to do a complete rebuild instead of an upgrade. I absolutely refuse to do a rebuild so....