Okay, so I edited a lot. I'd look at coupes or SLs, maybe an E-series convertible. Probably before '94 because I don't like the bug-eyed styling and it's been said that after '94 the bean counters took over the company.

Plug your parameters into ebay or autotrader and take a look at what interests you. I wouldn't necessarily buy from there, but it's great for window shopping.

30 miles a day isn't too bad, but then you'll probably want to stay away from the V-8s, so think about the 6 cylinders. You might want to consider an older SL, and there are a bunch here in Texas.

Wikipedia has some good info and links on the models and classes. Talking body styles (eg; 123, 124, 126) and classes (S, SL, E, C) gets confusing.