I own the cj Premier 17LS but the consensus is with Downunder concerning the superiority of the 16LS. That said, the 16LS is considerably more expensive and harder to find. I auditioned the PV14 before choosing the 17LS which I thought was, far and away, the better preamp. I'm sure that it would be a nice improvement for you.
Regarding the cj Premier 11, I had similar thoughts about mine and went with the cj Premier V mono-blocks for more drive.
Regarding the cj Premier 11, I had similar thoughts about mine and went with the cj Premier V mono-blocks for more drive.