After talking to USAA about my policy, I just don't have the confidence that they would do justice to the value of the car in case of a problem.
With the rebuilt engine, new turbo, redone wheels, the total value (money spent) is getting up there. I had an appraisal done last year that came in at 25K. I admit that is a bit high, but that should be a good thing.
It does look like they are the least restrictive of the bunch.
After all, the whole reason to have one of these cars is to enjoy it on the road, not just carefully wipe the dust off it every weekend while it sits in the garage.