I am a big fan of Conrad Johnson and have heard it a lot and many of my friends own it. I own Prima Luna. In general it is not in the same league... although the CJ amp you are using is very old.
Personally, and I like musical equipment would be looking to upgrade to a newer CJ amp and long term replace the Primaluna preamp with CJ. But to me musical equipment is most important. If you want more detail I would look at Audio Research.