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I originally did the same thing, for the same reason. But never used Vista again after the first time with Windows 7.
All programs that I ran on Vista work on Windows 7.
If you don't have the Windows 7 driver for something the Vista driver will work.
Just keep your Vista backup image, you'll probably never use it but, keep it for safety sake.
Use the Clean install method and use Windows Easy Transfer - Transfer To & From Computers
to get all your user settings from Vista, you will still have to install all the programs. It will make the transition easier.