Being in college myself, I would personally go Z31. Not because it is gay. I just don't like the miata look. Plus the Z31 can look so bad ass and tough. Alot of my friends with Z31's that are tastefully done get alot of comments about them. I love the convertable wind in the hair thing, but not for every day. Personally, I think you should wait for a Z32... or look harder.
My roomate has a Z32 with 180k on it N/A in pretty good condition (has a small swipe on drivers and pass side), runs strong, clean title, costed him $3100.
Or... Get a Foxbody.