My club usually uses SSDC, but still the older one, as it seems more stable (and easy) for C7030 use. There are still some oddities about the new version I'm not fond of, but with a few more tweaks and feature additions, it will probably be the choice for us. PCLC has a lot of great features, but it lacks some others that we are used to, especially auto-track-call. There's an RMS that I sometimes use that was in development when the developer died, but it misses laps every once in a while (so we compare to the Lap Display), but it has a great race/heat rotation system that is easy to set up, randomizes the racers nicely, and is quick to do so.
The end result is that there isn't a "perfect" RMS for me, but SSDC is getting closer.