One Car or Two?

My leased Volvo is expiring so Kent and I need to decide what we're going to do for our second car. What kind do we want to get next?

We own Kent's convertible, which we love, but hate to put a lot of miles on it. Since Kent drives close to 50 miles per day, we want to get something that is fuel efficient and economical.

What to do???
The question is...do we really need two cars?