I have to say the more I ride it the more I am warming up to the 3 setting for solo. Over the road I dont notice it at all, the ride is smooth. When I go over a dip or sizable depression in the road I notice more "launch" when it is on 1 and when on 3 I dont have to prepare myself so much for countering it, if you will.
I'm thinking 3 will be it, we'll see once I get my bride on the rear seat how it handles then. I'm guessing it will do just fine.
As with many things... Grandfather Time sorts it all out for us.