Your looking at the Smart for two then.
Have one at work, wouldn't want one personally, but they are ok if it's just going to be a run around.
They are very basic, i.e. a radio/cassette player (in the first models at least) and very flimsy being everything is plastic. There are several trim models available, i.e. Pure, City etc.
The SMG gearbox is very slow to respond, this was improved supposedly in the 2009 on models with a software upgrade, they are blown 3 pot engine.
As for performance, they are not bad for what they are, but obviously they are never going to be fast.
There is a Brabus model available as well.
Martin