Edit: When you say: "copy back my backup from Super Duper,", that makes it sound like you are doing a 360 and ending up back where you started. If you didn't know, when you use SD to clone your drive to a backup, when you fresh install Mac OS the internal drive, one of the first things to pop up is the Migration Assistant which let's you transfer back data from various options (USB/FW external drive are considered different sources, "External Volume/Another Mac", respectively).
--
I'd have to side with Richard to an extent here. However, you can still continue with your method of backing up/cloning, wiping, installing SL, but when you get to the Migration Assistant, just chose to copy over select user data like pictures/music and such.
There still is a possibility of a corrupt user file coming over, but that's easier to solve (making a new user) than if a system file came over corrupt, or application.
With just your user data transferred over (some of it can be "difficult" to manually copy like your mail/contact data and application support data ), you can go about reinstalling applications that you need. It would also be beneficial if there happened to be a new version.
Furthermore, SL gives you much more options on how to use the Migration Assistant than previous systems.