Windows 7 - Can I buy Windows 7 'upgrade' and still do clean install?

I currently have Vista Premium installed but I want a clean (format) install of Windows 7

Can I buy Windows 7 'upgrade' and still do clean install?

Yes, you can .... Clean Install with a Upgrade Windows 7 Version

Hi Chris K Welcome to SevenForums

Short answer YES no problem

When you boot the Windows 7 DVD, it will scan the HD to see Vista and pass a flag to allow Upgrade Version key, even if you then go on to use Custom>Drive Tools (which you should) to Delete all, create new partition(s) as you wish, then format before installing Windows 7 to first partition.

After you get it set up and running as you want, then save a Windows 7 Backup Image externally so you never have to reinstall again - just reimage the HD (or replacement) using DVD or Repair CD in 15 minutes.

Welcome

You have been given very good advice, several times above. May I just give you our tutorial in the event that you may have questions.
Clean Install with a Upgrade Windows 7 Version[2]=General Tips

You could save cash and buy an OEM version, but it will be locked to your motherboard, unless you call Microsoft and ask nicely to activate it on another PC.

Thats great thanks

Any idea where i can buy cheapest OEM Windows 7 Premium?

Newegg.com is a good place to start.

There is no reason to buy the OEM for you though. It is more expensive, and an Upgrade license will work just as well.

You also want the flexibility to migrate your Windows 7 upgrade to any other machine in the future if need be, which you can't do with OEM that becomes locked to the hardware and is intended for System Builders.