I'm looking for a 1-2 year old Audi S5 (V8). I also considered many others in the same price range, power, speed and with a back seat.
E63 AMG - great raw power, interior is nice, but I don't like the exterior much.
Caddy CTS-V- great power, hate the interior, exterior looks too angular for me and the fit/finish and layout way below anything of Europe or Japan.
M3= great for the track, but looks too much like other BMW 3 series. Interior was just okay IMO.