I have had the 840c since the week after the TAS review.
It replaced the Rotel RCD-1072 I had at that time.
I have no experience with Jolida or the Sony.
The 840c is superior in every respect, even with HDCDs, vs. the Rotel. Additionally, I had tweaked the Rotel with a HiFi Fuse, internal damping, footers, isolation base and Bright Star top, and a gold Furutech iec inlet. This was much more detail than stock, but no where near the performance of the 840c.
It replaced the Rotel RCD-1072 I had at that time.
I have no experience with Jolida or the Sony.
The 840c is superior in every respect, even with HDCDs, vs. the Rotel. Additionally, I had tweaked the Rotel with a HiFi Fuse, internal damping, footers, isolation base and Bright Star top, and a gold Furutech iec inlet. This was much more detail than stock, but no where near the performance of the 840c.