For what its worth, I paired an earlier CJ preamp, the PV-10, with an Aragon 4004 SS amp about 10 years ago when I bought my present system, after hours of A/B tests with tube and SS amplification at the dealer. The Aragon amp is a lesser-powered derivative of the more famous 8008BB designed by a former Krell engineer. The combo drives B&W 801 Matrix speakers. The system performance jumped dramatically when I had the CJ subjected to a full standard mod including the highest quality passive parts, tubes and work on the power supply. Then I had the same thing done with the SS amp with further improvement. I haven't tested the modified preamp against any current CJ model which would cost much more than the total of my PV-10 plus mods, because I haven't felt the need to. In fact, on a cost/value basis, I began to wonder if a good audio technician could accomplish more for my system than swapping out older equipment for newer.