Thank you racerns for clearing up the F-body/Mustang handling thing...I was dying to say it first, but it look slike you beat me to it...I actually laughed to myself when I read that!

As for the rest of thread, I think this is a great debate, that is completely unfinishable (sp?). All very good points...some notes:

I know that Nissan actually altered the gearing in the 350Z Roadster to make up for the frame support (and resulting weight), substantially enough that the Roadster actually out-accelerates the hardtop version slightly.

Someone mentioned the MR-2 Spyder handling like a gokart but now having enough power to keep up with other sports-car classes? My rommate's 2000 MR2 Spyder accelarates plenty fast, so if this is the primary argument to rule out MR2's in the Sport Car calss, it is invalid.

And most importantly...where do you guys think the Supra/Skyline/VR-4/RX-7s (Jap Supercars) fit into this? I'm pretty sure only the RX-7 could be remotely considered a contender for being in the class, the Supra is a dream to drive, but not as nimble as the cars you guys are putting in the Sportscar class. I would imagine, if they were domestics, they would be considered Musclecars, but as it is, just we just call them Supercars and be done with them?