I have owned the cj prem 16 and upgraded it to series 2. then sold it - to go to VTL 7.5 - mistake. I never like the prem 17, just seemed to have no life in the thing. I find the prem 16 musically more enjoyable than the ACT2/CT5.
I have own the cary 98P that I bought as a stop gap at the beginning of the year and it sounds very good.
the cj prem 16 sounds better to me ( slightly tighter bass, quieter) and its build quality and steps in the volume control are light years ahead of the cary.
The cary is very good thou and is cheaper than the pre 16 s/h so a VERY good deal.
I am looking to sell the cary as I have a new pre amp - hopefully the last one