It would depend on my goals, T.

If I were going to just do sprint races, I'd stick with the Golf - less expensive to fix, good MARRS fields, less costly running expenses (tires, particularly).

But if I were still leaning toward enduros, I'd go the R route. That would give you the best opportunity (more tire, lighter weight) of an overall win. I think that a car that has a shot at the front will be better for attracting $$ renters, and over the course of a 12-hour event, consummable costs shrink relative to others that are fixed regardless of the kind of car one runs (e.g., crew hotels).

K

PS - if you're thinking about going endurance racing with it, give me a holler. I can make you a screamin' deal on some top-notch refueling gear.