Looks like you want a 2+2 with a DCT.
In that price range your looking at the M3 DCT, Audi S4/5 DSG, and V6 Panamera w/ PDK.
Dropping the M3 because you want something different, the only thing I add is the V6 Panamera. It's no straight line performer but the interior is rediculously good, with the exterior polarizing. I didn't like the Panamera in pictures but when I saw one up close and sat in one (S model) I was in love.
I drove an S4 and liked it as a cheaper option. I personally love the look of the S5. If i could get away with 2 doors I would get the S5 (actualy I'd get the Caymen S but you said you didn't want that).
On a side note, I'm not sure the M3 is going to suffer some terrible depreciation when the next M3 comes out in a couple of years. The last NA M3 and a V8 one at that will probably carry on in popularity with M3 enthusiasts (even though there aren't all that many). A lot will depend on the welcome an FI V6 in the M3 recieves.
08 GT500 convertible red package (Black w/ Red stripes) /Ford Racing Exhaust /Cold Air Induction 560hp
10 Porsche Cayenne GTS Black w/ Black Wheels 408hp
11 M3 Silverstone w/ Silver Novillo Leather /Tech /Premium /19" /DCT /Ipod 414hp