Sony or Panasonic 4K Player vs. Magnetar or Reavon Universal Player

My aging Oppo 105 is my source for watching DVDs, Blu-Rays, and listening to multi-channel SACD and DVD-Audio discs. It does not have 4K capability. I am looking to add 4K UHD capability to my system to watch all the great 4K UHD Blu-rays that are being released. My options are to buy a dedicated Panasonic or Sony 4K UHD Player, or to go all in with a Magnetar or Reavon Universal Player. At this point, my Oppo 105 is still working, and I use it to play multi-channel DVD and Blu-ray concerts, SACDs and sometimes DVD-Audio discs. My main digital audio source is my Denon DCD A110 two channel SACD/CD player. I find this source is so good, it presents an impressive soundstage with only two channels. So, do I add a dedicated Sony or Panasonic 4K UHD player, or buy insurance for my Oppo, and add 4K UHD, while retaining the ability to play SACDs and DVD-Audio discs? Here are some of the units I am looking at for this purpose: SONY UBP-X800M2 for around $225.00. Panasonic DP-UB9000P1K Reference Class 4K Ultra HD Blu-ray Player with HDR10+ and Dolby Vision Playback for about $1,000. Panasonic Streaming 4K Blu Ray Player with Dolby Vision and HDR10+ Ultra HD Premium Video Playback, Hi-Res Audio, Voice Assist - DP-UB820-K for about $450.00. Reavon X200 for about $1,750. Magnetar UDP 800 for $1,599.00. Magnetar UDP 900 for $2,999.00. The costs range from $250.00 to $2,999.00. I have the funds for the flagship Magnetar, but I don’t want to spend that much. Thanks.