I'm with Rob, every petrolhead should at one time in their life own an Elise chassis and experience being properly connected to the road!
Otherwise, I do love the mk2 SLK look with the F1 inspired front end (appreciate its marmite though) and in V8 format is fantastic
The Fiat Barchetta is stunning, shame they are LHD!
I saw a Honda S660 at a show recently, they look brilliant too, I love how they show off the engine bay etc.
Of course you can then go back in to British sports car eras of the 70s and they all look absolutely fantastic, even if they fall apart during use!