currently i have an 01 a4 1.8t but I'm interested in selling it later the year or early next to either get a b6 S4 or an 05-08 acura Rl. obviously anyone here will probably have more info on the S4 but has anyone had experience with the year range rl im interested in?

what are the pros and cons of both along with what kind of repairs might i be looking at as soon as i get the car?

all kinds of info would be helpful.