Recommendations for Blu-ray Player

Marantz.... 

@bkeske wow, that sounds like a big plate of spaghetti cabling. Think I'd have to see a drawing to comprehend it properly.
Yes, we too (like many others) cut the cable when Netflix went online - 2008'ish. So it's been... over a decade? How can that much time have passed - feeling old.

There is a full HT system in the basement (Denon AVR-X7400H, Xbox1S, 7.4.2 surround (if you count the GoldenEar Tritons built-in active bass as subs - which I do), all the 'surround' effect speakers are Martin Logan (SLM-XLs and in-ceilings). Honestly, I wouldn't mess with that system unless there was no other option.

The 'primary' 2-ch system consists of NAD C388 class D/H? (with BluOS2i and HDMI-2 modules added) run through ATI class A/B (for testing class D vs A/B) and various speakers turn-through the stable - it's a bit of a test-bed for music listening and system tweaking in a dedicated space upstairs.

This project has to do with the 'secondary' 2ch system built into the 'primary' 2ch system - for fun/discovery. Linkwitz LXmini speakers - which I have found to outperform practically everything, including Martin Logan electrostats (which I currently have for sale), and Tekton DI (w/factory upgrade) that I sold very recently. Problem with LXmini is, if you want to tweak them to your liking (like voice them to match Tektons - haha), you can't go the Pass Labs passive crossover route - you must use a 4-channel DSP. Problem with DSP (even the miniDSP4x10HD that I use) is the weak (by some standards) built-in DAC. So how to get the most from a DAC... use USB or coax inputs (optical is limited). The 4x10HD has one (1) coax out - but 2 are needed to produce 4 independent channels required by LXmini. Enter the miniDSP nanoDIGI (with 1 coax in and 4 coax outs and no DACs). Then all you need is two (or in my case 4 - gotta control that sub bass) stereo DACs.
I chose the economical yet highly rated and known to be warm (non-analytical) Topping E30 (x4). This secondary 'fun' system is to be connected like this:

Multi-disc streamer --coax(x1)--> miniDSP 4x10HD (for volume control and input switching) --coax(x1)--> miniDSP nanoDIGI (for active LXmini crossover) --coax(x4)--> Topping E30 (x4) --RCA(x4pr) --> ATI 6012 (12ch amp)
--Spkr(x4)--> LXmini speakers (play down to 35Hz)
--Spkr(x4 bridged = 220wX2)--> open-baffle subs (play below 35Hz)

Notice the small issue above with the miniDSP4x10HD - where it has only one coax input for digital sources - then it also has balanced and unbalanced inputs to be used for analog sources (but those are AD-converted at the input). With this system architecture, all digital sources will have only one DA conversion - performed simultaneously (with ease) by four (4) Topping E30's.

I just need to find that multi-disc streamer with AmazonUHD, coax and HDMI outputs. Even if it had just HDMI out, I could get-by using an audio extractor - but that would likely limit the signal quality, as those extractors are pretty cheap (looking).

@limomangus I did find one Marantz product that is close, the ND8006 is a CD-playing streamer with HEOS. My HT AVR is a Denon with HEOS, and it has Amazon UHD capability (think all HEOS does). ND8006 is missing video entirely, but it does have a coax input - where I could connect the coax output of the Sony Blu-ray player. It just seems like an expensive solution for not being complete. I find nothing in the Denon lineup that fits the bill.

@bkeske the smart TV idea might have merit - if it had a coax output that would pass-through audio from the Sony Blu-ray player HDMI connection - that search is beyond me... way too many choices when TV shopping.

HiMedia S500 player with a linear power supply.  It's one of the only two "generic" Android 9.0 OS devices, supporting full AndroidTV and Google Play apps, including Amazon Music for HD.  Alternatively, Nvidia Shield, but it has a proprietary power cable.

Maybe FireTV Cube with linear power supply, but it has a smaller non-standard DC plug.  An SBooster with all the different adapters would likely work).

Roku with linear power supply?

Unfortunately, all these devices only output audio through HDMI.  There really isn't any device that does what you want and still has a digital COAX output.

OPPO BDP 105, Buy one if you can find it. Luckily OPPO was forward thinking enough so that you dont need firmware updates or any kind of updates. The great news is it will handle all your requested needs and then some!  I would buy one in a heartbeat if available because as bkeske has stated they dont make these anymore! (a Firestick hardly replaces this unit ,not even close).Because they are disc players OPPO is doing there forward thinking agian and sees discs are bad! LOL.

OPPO Digital universal players support a wide variety of audio file formats and sampling rates. When playing high resolution audio content from a USB hard drive, all of the typical high resolution audio formats are supported, including WAV, FLAC, ALAC, AIFF, and DSF/DFF.

USB Hard Drive and Network (SMB, NFS, and DLNA): Stereo and multi-channel PCM up to 192 kHz. Stereo and multi-channel DSD up to 2.8 MHz (DSD64).

USB DAC Input: Stereo PCM up to 192 kHz.

There are preowned ones still available....I think.

www.amazon.com/OPPO-BDP-105-Universal-Audiophile-Blu-ray/dp/B00BEZQU3G

Also,  1. These are highly modded by MODWRIGHT Instruments,

       2. You can add a very high quality dedicated music streamer via the OPPOs USB 2.0 audio connection :-)

Matt M