When I finally get round to a self build, I will have a 'clean' illuminated garage with glass on three sides, even if it's a relatively ordinary car that's in there. A Chesil Speedster would be ideal, cheap to buy, fun to drive and great to look at. Droopsnot Firenza maybe.
Money no object? A real Porsche 356 Speedster, Lamborghini Miura, Bugatti Veyron, or Ferrari 456. Or if it's a big 'un then an early 1980s Aston Martin Lagonda.