I have the RC in both the 8" and 12" versions. While field curvature needs to be address, I believe they produce images that are sharp and detailed. Choice is yours of course but here is a few links of images I have taken with the RC8"
http://paulhaese.net/NGC5128QSI.html (image needs a lot more data)
http://paulhaese.net/M17SwanHargb.html
http://paulhaese.net/IC2944RunningChicken.html
http://paulhaese.net/HorseheadLRGB.html
http://paulhaese.net/ThorsHelmetHaRGB.html
http://paulhaese.net/m83closeup.html
Few others in that gallery that were taken with the 8" too.
Best of luck with your selection.