That Sony UBP-X800m2 has one very annoying quirk: It won't autodetect Dolby Vision so you've to manually enable/disable that in the players menu. For me that is a show stopper.
I was hoping that could be fixed with a firmware update but that has not happened yet, sadly, nor any updated UBP-X800m3.
Se here I am considering the Magnetar UDP800 as a replacement for my Oppo BDP-93EU that I bought in 2011 as a universal player as I've a number of SACD. The issue with the Oppo is that I've to disable "HDMI Deep Color" in the LG OLED TV to have any sound but then I don't get Dolby Vision from my AppleTV I bought two years ago. The result is that we use the Oppe player much less than we used to.
However, the Magnetar UDP800 is very expensive and have analog out that I wont ever use as I would only use it as a transport.
Edit: One possibility is to buy the Sony UBP-X800m2 for SACD/CD only and then Panasonic DP-UB820 for UHD Blue-ray (or similar) when I actually buy a new Blu-rah UHD movie in Dolby Vision. That would be ca half the price compared to the Magnetar UDP800.
I got the Sony UBP-X800m2 a couple of days ago and so far works fine with SACD as well as Blu-ray movies. So my Oppo BDP-93EU I bought 13 years ago will go to storage.
The Sony was easily added and integrated with my Logitech Harmony universal remote, though it has fewer available commands. Most importantly in the Logitech database there was discrete commands for power on and power off, which should give less issues when powering my system on/off or changing activity. UI, configuration and command wise the old Oppo is far ahead of the Sony.
Is weird with a player with no display. It will not autoplay SACD.
I’ve exactly one Blu-ray UHD disc and that one only has HDR, so thus far missing Dolby Vision autodetect does not bother me.
And yeah, I got the player at a very good price.