Hi Fishwater, I have a pv 10 and bought a used premier 14 about 2 years ago. A really big jump - music is so much more natural, every area improves - bottom end, top end, detail, imaging. It is also more neutral/natural - not as euphoric as the PV10. I got a reminder this week - I'm having a problem with the 14 and sent it in for repairs and put the PV 10 back in. It's a very nice preamp but it is not in the league of the 14. One caveat - there aren't alot of 6GK5 tubes available if you like to tube roll - CJ is now using all GE's. They were using GE's and Sylvania's which I think were the best combo, but I guess they can't get the sylvania's anymore. There are also Mullards and Hitachi's available from other retailers that are interesting but in my system the GE/SLY were the best overall performers. If you like CJ - move up into the premier line when you can is my opinion and you'll never look back.