To change an RS bike to an RT bike is a little more than the fairing. Of course you need that, complete, but don't forget the handlebar and because the handlebar is a bit longer, some of the cables or is it all of the cables have to be changed. The wiring from the switches on the handle bar are usually long enough. Extra wire is pushed into the headlight shell. If not long enough though you have to lengthen an awful lot of wires.
The RS models are usually more Horse Power so they make nice RT bikes once you are done.
I'm an Airhead guy but I think I should say that I agree, K bikes are less maintenance and less likely to break on the road.