Other options:
I need to order a usb-c to coax for spdif to test the sound of the S6 Lite Tablet my wife just got for her birthday, even with audio out to the Martin Logan it sounds pretty darn good and easy to navigate Qobuz. I might consider getting another Tab to use with a DAC. This does not solve the issue of playing our limited Blu Ray, DVD and CD collection, just a few hundred disks.
I can get a refurbed Dell or HP sff computer which will hold an inboard low profile video and audio card with a decent DAC(I hope) for pretty cheap. Then maybe a little monitor to sit on top or just use the TV but I like to keep it closed up to the ceiling and out of the way, we seldom watch TV. The Dell is quite a bit smaller than the HP which is bigger than I prefer but both will house a Blu Ray player.
The Martin Logan is a very good sounding sound bar, picked it up for just $200 to get by with when I took out the system we used the past few years which included KEF line array speakers. The DAC is pretty decent but not up to par with the OPPO DAC( I only use stereo and sub, never been into surround systems, the SE Oppo is quite nice)
Sub setup will be one of the below subs, most likely sealed enclosures, all are car audio and work very well and all sound very good.
2) Arc Audio 10's in sealed enclosures built in back wall.
1) Arc Audio 12 Black Line, been in use here for years, great sub!
2) Image Dynamics ID 15, sealed, used to run 4 of these in the house with over 3kw class H, did a nice job with the Edgarhorns.
1) Dayton 15 sealed with 1kw class H plate amp.
1) Dayton 1kw class H component amp with single band EQ used here for years. I like it the best of the two amp choices due to the EQ which has Q adjustment as well but the plate amp in the unit above this is an easier fit space wise.
I will build a remote volume control and hid the sub amp.