The problem with the RS is what do you do with it? Its a phenomenal road burner. the fairing transforms a mediocre bike into a tremendous long distance bike as long as you keep to the motorways.
My 78 RS would pull into the red line in top gear and show well over 130 on the speedo (I know there's a margin of error here) without a doubt its the best air head engine i've ever had or ridden.
The problem came with anything off the main roads, I just couldn't get the bike to hustle round the bends, mainly I think the rough having bars narrower than my shoulders and that "Hands in a bucket" sensation.
I have a local road that I've used for nearly 40 years to get the hang of a bike. The RS always felt like it wanted to kill me on. My other 78 R100 has the same suspension, obliviously no fairing, and wider bars and feels great on that stretch of road.
If you have some long haul riding to do then an RS would be great. I sold mine to a Frenchman (nobody in the UK wanted to buy it at) who was very pleased with it - apart from a loose rocker box cover

and him not understanding the airhead charging system.
Got this from him when he got home:-
Bonjour Rob.
I made it back with no prob. Needle on 90 most of the time and I sliced through the French highways like a knife in fresh butter!
A few issue still:
- My boots are all shiny courtesy of a rare option you omitted to mention; The shoe oiler!
Small leaks from the head cover gaskets I presume. Do I need to tighten more the cover;?
- A red warning light when idling. Even after 8 hours at 5500/6000 rpm the light was still on. It stops just above 800 rpm ??
Other than that, nada. It's an amazing job you did on this bike, it grow on you each mile, and the mid range power and sound is very rewarding!
Congrats and many thanks
Fred