The rich bastard has a pro crew chief, what's next, Ron Fellow's in the passenger seat at all the events?
I agree Greg, I'll add driving skill and at what level you are pushing the car. Since you are older and more experienced, I see you as a more patient racer that doesn't abuse the tires. I would think you could get by with an A6 more easily than a 10/10ths guy or one with poor chassis balance. For me, it would be what gives me the best consistency over five, twenty minute sessions.