Realistically a 355. Maybe a vert for weekend cruising. Maintenance costs would probably keep me away.
http://i.imgur.com/EMJk0G7l.jpg
Track/fast car: C6Z06 (or whatever the C7Z will be) done up for the track completely.. built engine, big brakes, suspension, wing, seats, etc.
http://i.imgur.com/EbJOs38l.png
Daily in summer: CTS-V wagon 6-speed
http://i.imgur.com/t6phAiCl.jpg
Winter beater: Audi All-Road
http://i.imgur.com/gbGo55Gl.jpg