I'd suggest you go over to Edmunds or Yahoo Cars and do some comparisons. I plugged in midsize coupes and very few cars come up. Even fewer when you remove the ones that are over $50k. Basically, you're left with the G35, the Mustang, the Toyota Camry, the Honda Accord, the Pontiac G6, and the Chevrolet Monte Carlo (yuck!).

You might want to check out a new Camry. They changed the styling this year. I think it looks pretty neat, but I've not been in one.

There are other coupes available in the same general size range, but the G35 is just big enough to be classified as a midsize instead of a compact.