[Igofastr]

Luke,

Bummer about the back problems.

In my experience, Porsche 911s are some of the most comfortable sports cars there are to drive, and you're going to have a hard time finding something similarly easy to live with, except maybe the Daytona Coupe. Cobras that I have been in tend to be a bit jarring, with a very upright seating position and not a lot of support. That can be tough on the lower back especially, as you've found out. GT40s, once you're in, can be quite comfortable if the seat fits you. But, there's not much you can change if they don't. And, and this is a big one, they can be very difficult to get into depending on your flexibility and stature. I love my GT40, but I would sell it in a minute if I had lower back problems. Definitely go for a few rides before making any decisions.

Good luck, but I would sell the Cobra.