Not exactly Pro-Touring, but it definitely has PT roots...
I still work on PT cars, but my current toy is this Radical SR8. Here's an onlap video at Sebring of my current personal best of 2:10.9. As a point of reference, my best time in a C6 Z06 was 2:27, and high-end PT cars would likely be in the mid 2:30s. The car is mid-engined, powered by a 2.8L V8 that makes around 400hp. The car weighs a bit under 1500 lbs, so 400hp is plenty. As someone once said, it's more fun than sliced bread, or something like that. :)
Accompanied by Motley Crue:
https://www.youtube.com/watch?v=QHvpI1U5gu0
engine only, please version:
https://www.youtube.com/watch?v=dkjj90xk31k&t=25s
