I would suggest go and have a look and test drive with different options.
Here's a map of builders locations:
http://www.madabout-kitcars.com/foru...2526#post12526
When I started my build, Marlin did not like the Rover turbo option. But is a very viable performance 200+ bhp car.
There are a few k series, type R cars completed. But very litte Vag ones completed. Mine is the only one I'm aware of but is far from the standard 180bhp donor. And was not cheap.