I have a 71 superbeetle, and I like it. It handles better than a regular beetle. It actually has a trunk that you fit something into. It's also a mystery car that people will look at and tell you to your face, in front of the car that "they never made a flat windshield super" With the 71, from the doors back it's the same as a regular beetle. You posted this on a moped forum, so I know you are up for something different- go for the super.
If you have time check out this book to see how to restore one.
I'd go for the super, I'm baiased.
Urethane cures the superbeetle shimmy, and any older car will run into the same issues.