Congratulations on the car, seems like an easy project for you and a great example of a (so far) unmolested Sporting 90....
I think it looks great with the standard wheels, and the stock interior is classy as well. The Strada wheels look better on the Panda because they look a lot like the original 1000S plastic trims...
I reckon if you just give the 1.6 engine a minor fettle and refresh the brakes you'll have plenty of enjoyable, usable performance. Those old engines are very grunty and with the final MPI mods they could actually rev and breathe (unlike my Tipo 1.4...)
I nice sporty Mk1 Punto is easily as cute as a trendy but now boring 500...