One guy I autoxed with said the rsrr were ridiculously noisy on road. He didn't much mind as that car wasn't his daily.
I have the RT615K+ in 205/40/17. Don't find them noisy at all. Nice and grippy. Probably my only complaint would be the amount of rocks and pebbles they hold on to at low speed, makes such a racket in the rear. Get going fast enough and they can't hang on though. Also, so far they've been fine in the wet. Read some complaints about wet grip, haven't had that issue myself.