You may have your preferences with the massive tweaked Windows you've been running for year, then you may have to stick with it.
But, if looking into all given suggestions above, I think you may consider seeing it from different angle. Start with 64-bit clean installation is not a bad choice at all. Later you can find ways to have some of your preferences.
People in this forum are going to be perfect assistance in doing so.
That's my two cents.