Considering your back, along with a healthy budget for "a good daily but be a real attention getter", either go the resto mod look on a 60's car or go totally modern with a supercharged '10 Cuda.
Even with one-off body panels you could build one of these for well under six figures. I think they're bad azz when done with the shaker hood. And the Challenger platform should be easier to get in and out of (again, considering your back issues).
-Dean