At your height the best bet would be a Corvette. The Corvette is good up to 6' 5" because one of the designers was this tall....

It also sounds like you would be putting a ton of money in upgrades even if you got a SRT-6, if you add it up you could probably be in a C6.

Now getting back to the crossfire - I am only 5' 10" and my hair touches the roof If my chair is at a 90 degree agle (I have short legs and a long torso). I have had to modify my comfort habits to get use to leaning back a little to compensate. The car is comfortable on long trips. I put in about 700 miles durning labor day - the longest single streatch was about 2 hours and it was way better on me than my SUV was. The trick seems to be getting the seats in an angle where you don't wish you had lumbar support.

I would take another test drive and take the time to see if you can get the seat into a comfortable enough position before I made any decision. I took two test drives before making a decision myself.

-marc