Windows 8 Full Version for Parallels?

[dmw16]

I'd like to install Windows 8 in Parallels 8 on my MacBook Pro. But I am a little confounded by what version of Windows 8 I need to buy. After buying Win7 via the Digital River deal and having all that hassle I'm a little gunshy.

I currently don't have Win7 installed nor do I own a copy I really care to bother with; I "gave" my brother my digital river copy of Win7 so that's gone.

So can I just order this:
http://www.newegg.com/Product/Produc...82E16832416550

Or do I still need Windows 7 to install that version?

Thanks.