I'm thinking of test driving the Z4 Coupe actually. Can't hurt.

Porsche BHP seems to be enough, the head line figures aren't that impressive in the Cayman and basic 997, but when it comes to using the power not much in the same class can keep up with them on the road or track. The 911 uses its modest power output even more effectively due to the engine position and being able to get on the throttle early and deploy the power, that's more important than headline power figures. Give me a car with well setup suspension and a compliant chassis any day over a car that has excess power which you can't use most of the time anyway. This is the main problem with TVR's in my view.
edit after reading the article

Sounds good, but I suspected the ride would be too hard for UK roads. Like the looks also, but it might not fit me very, well being 6'2 and like having a straight legged driving position. Gonna test drive one asap.