Women over 35 only, I'd like your opinion?

I'm a single man trying to improve my chances at finding a good girlfriend. I drive a 97 Subaru Outback wagon (which I'm perfectly happy with) but the last woman I dated seemed unimpressed by it. I've been saving for a while for a new car and can pay cash. How much more attractive would I be driving a 2008 Audi A4 sedan than the old station wagon? Can you suggest a car?