Well, the '85 wheels are different. After' 86 they're all the same except for the couple years black ones.
Available swaps that I can think of off the top of my head are:
Carrozzeria - from Sean (one2dmax) $$$$, but lighter and sporty looking. 18" front and rear.
Divvy swap - most popular in Europe, but I believe it's what I'm running. 17", not so much $$. I have centering issues, but lets me use radial tires.
R1 (or other) modern sportbike wheel - usually goes with a front end swap to upside down forks. $$$ just for the front, then you still have to deal with the rear.
RC Components - heavier than stock, but more design options. $$$ for a pair. Will be 18".
Dymag- 17" $$ and come up on here from time to time. No longer produced as far as I know, but lighter than stock.