Obviously I think they are great little cars, go sit in a few and see if you can live with how small they are. I'm 5' 10" and it really has its small moments for me, but I live with it fine. The cars are really bulletproof, do the maintanence like you should and they run forever, timing belt, oil/fluid changes, ect. There are many racers who seek out higher mileage cars because the bottom ends make the most power at 100k miles. Drivetrains are built well for stock power and stand up to most mods without blowing up, something that can't be said for most GM cars. Had the 91 I sold ben in better shape (rust) I'd have just stuck to racing it because I loved the car. My Mazdaspeed Miata is an absolute blast, a little tighter interior then the first gen, but a well put together factory toy.
I could care less about a rollbar but thats just me, tops are important when looking at them, if you can get the hardtop you're so much better off and keep in mind that hardtops go for $1k-$1200 used so you will pay for it in the cost of a car. Lots of aftermarket, lots of used parts out there since there was so many of them made. The best part is how it is RWD and handles like nothing else for the money. Mine handles better in the rain then my Camaro in the dry, my 91 on Blizzaks handled better in the snow then anything else I've ever driven on all seasons.