I have 225/50ZR/16 KDWS and they are pretty quiet. After 10k on them they still have a lot of life on them (this with some harsh driving on nice roads). Heard a lot of people went through a set of KDW's betweek 8k-15k.
Hope that helps. Oh, and the 225's look better but I don't know if there's any noticeable performance loss.
