What is as tube sounding as Conrad today?


Looking to buy a tube preamp for my Class D Tripath amplifier. It boils down to (from most people) Conrad Johnson older PV series as being the most tube sounding preamp. Or some people who don’t like that sound call it dark. I surely don’t want dark as if you put blanket over your speakers but lush/warm/romantic sound is what I like. Can I buy a used preamp ($300 budget) sounds like Conrad PV line? Don’t care too much if it is from China as I had pretty good sounding stuff from China before.
celo
Anything that uses valves can be warmed up, or made more, "romantic", by installing genuine, NOS, British flavored tubes(ie: Mullard, Brimar, Genelex, Ediswan).   
Any recommendations for my CJ? It uses a single 6922 Electro-Harmonix. What do you guys recommend as a replacement?