im looking to get rs4's aswell and i am just going to settle for 18". i think they will look just fine.i was also looking for the RC's but pretty costly.
some other bbs wheels suit the car i think but costly once again so 18" rs4's it is for me too bud.
i read alot about people taken 19's back off because of comfort and feeling every little pot hole going(or feeling like your going over a pot hole but actually its a 1 pence), but each to there own i suppose