The c4s was my favorite, beautiful hips and the light bar made for a wonderful sight! I test drove many including the turbo and the cab but never owned one.
And it suffered from the usual rock hard chassis setup that plagues most Beemer. Supposedly it improved with later gens. The current boxy version is possibly the best but I couldn't live with the LCD screen dash, it's a complete abomination and a deal killer for me, thankfully I no longer need to wo
About 20yrs ago we had a bunch of riders in the same team, one guy used to commute on a 999, my buddy a 748S and I had a 91 900ss and a 1100 Sport Corsa in the stable at that time, memories! Safe riding!