The 17 would be a substantial upgrade to your PFR. I would also suggest you upgrade your amp to a 2250A or 2500A.
I compared the CJ 17 MKI to the ARC LS25 MK II a few years ago. The CJ has a very nice warm sound to it and the ARC is more detailed. Combining the two is what I have been looking for but that has not happened in this price range. I have not heard the 17 MKII which I am under the impression has more details than the MKI.
Hope this helps, Happy Listening.