>>The GT looks like it's more technical so that is a concern. Also there seems to be quite a bit more "after initial purchase" expenses to the GT. Or at least the parts seem to be much more costly.<<
Which is another reason why the "turnkey minus" concept works better for a lot of people. Essentially, the GT40 (CAV GT) is like a Formula car with a full body. It employs racing brakes, a racing clutch, and a suspension system that allows for virtually any tuning and adjustments you'd ever need. My CAV, with a crate 302 and the Audi Getrag transaxle, is worry-free and relatively inexpensive so far. It is an absolute dream to drive; once the car is dialed in, you won't believe what it can do in the twisties, even with street tyres.