I don't care if it is a so-called "chick" car. I stopped driving the W210 when I got my NA Miata (1st gen). So boooring in comparison. It just sits waxed in the garage now. The Miata is nimble, fun to drive, great on gas (28 mpg on regular), bulletproof reliable, and parts are way cheap. I have a 65 mile round trip commute each day, and the Miata has put joy back into my drive. I think It's basically a motorcycle with 4 wheels.
The NA is the roomiest of the Miatas. I'm 6 foot 1 and 200 pounds, and have no problem fitting. In the NC (3rd gen) my head barely rubbed one of the crossbars for the top; that tells me the interior dimensions are somewhat smaller.
Check out the Miata forum if you want to do more research:
http://forum.miata.net/vb
I paid about $2,000 for mine about a year and a half ago and have put very little into it. I have put about 20,000 miles on it without any major issues.