Yes- The CJ will be an upgrade from the Yamaha, and should you not immediately appreciate it's sound: you'll have the option of rolling it's tubes to better suit your tastes(especially if you listen to vinyl). The PV-10B had a few cap bypasses in the power supply and signal path, better resistors and other refinements, compared to the 'A'. Like the others have said- Relax and look forward to your new/improved gear. A lot depends on your other equipment, but I'll bet you end up listening to your entire music collection, and enjoying the sound staging/imaging the CJ delivers.
Bad preamp choice?
I hope I didn't make a mistake. I recently purchased a CJ PV-10b Preamp. This pre is different from a PV-10a, as it uses the PV-12 linestage. So it should sound more like the 12 than 10. it's also the latest PV model. Anyway, I fell in love with the simple PV looks many years ago when seeing one at the local Audio Shop. I finally broke down and bought a minty one, thats currently in route to me. In the mean time, i'm reading the worst reviews i've ever seen from this forum? Can A CJ really sound that bad? Are these reveiws and comments just from elitist with $20,000.00 Preamps. Will it not sound better than than my old but once TOTL Yamaha c-80 pre? If I can't get a decent USED pre for 6 or 7 hundred than i'll pass, and go on to one of my other interests.