Another vote for C6. Based on your wishlist, go for a C6 GS. If you don't go widebody, you will regret the decision if you don't.
If you think C6 interior is trash, you should spend some time in a C5.
I have a c6z and love it. Interior is trash but the driving experience more than makes up for it. c5zs are equally bad ass. If you go c6z make sure you get one that has the heads done (as i am sure you are aware).
Keep your eyes peeled on the classified section of the corvette forum. There is a very nice H/C/I SCd cyber grey c6z listed for 36 at the moment. That is a monster car at a great price.
Bringatrailer also has very good pricing as the blow dried assholes on that site are too focused on bmws and porsches.
A super nice c5z just sold for super cheap and there is an anniversary version up right now.
If you think C6 interior is trash, you should spend some time in a C5.