Hi there, I have just bought a 2007(57) a3 1.6 - I want to buy some new wheels for the car and particularly like the BBS speedline rims - or the rs4 style ones. My question is am I best buying 17's or 18's. I would prefer 18's however would I need to lower the car to avoid it looking like a monster truck?/Rub? And what tyre profile should I go for? I am completely clueless! Thanks, Luke.