My wife has the RS SE5 and we ride 2up on that. She feels very comfortable on the back and that's without a seat back although one is on the way from Corbin. She is also riding it solo and said she like it much better than the RT. She said the RT felt huge with all the plastic around her. We both have RS's and I think if we were to ride 2up all the time the RT would be better. Good move in giving it some thought. Best of luck in your decision.