Super 40,
I have no idea as to which one of the GT40's is the best. What I do know is the Roaring Forties was the Best for me. All of these GT's are fine examples of the essence the original had..
You absolutly must do your homework by making a spread sheet and write down what's important to have in your GT.
CAV makes turnkey minus only but most of the others do kits and turnkey minuses. Personally I think most the turnkeys are competitive. It's going to depend on what options you get .
ERA is far and above the others as a turnkey minus but it's up to you as to whether the extra cost is warranted.
Hersh