Four real seats?

[gerrygug]

http://goodstuffauto.com/inventory/9751/9751.htm

This might work for you.

[dmcutter]

I test drove an E46 M3 a couple months ago-I loved it. I seriously considered trading the Box for it as it would be a much more "practical" every day driver. Alas, they couldn't offer enough on my trade to make it worthwhile. It doesn't handle like a Box, but few cars do...but it's a rocket. If I drove an M3 and had never driven a Box, I would be perfectly happy with the Beemer. But nothing feels like the Box when you're railing through the twisties.

[ChrisZang]

I also would say M3 or RX8, but if you have some more money to spend, there's always that car, which - I believe - outperforms the Boxster, the Carrera AND the M3: http://en.wikipedia.org/wiki/Ferrari_612_Scaglietti

[lowinor]

The Infiniti G37 convertible should hit showrooms soon. Check it out if you're unfamiliar with the G series -- to be completely honest, I find them more fun to drive than the 3 series.