So I've gotten tired of the whine from my Pioneer 8100NEX, probably a pico fuse, I think.
I decided to go with the Joying unit. I got a 10.1" touchscreen/double-DIN. Here's a link:
I went with this one mainly due to it being one of the only units out there with a digital coax output I could find - again, noise issues have been plaguing me. And yes, I've tried grounding the RCAs, but it's not good enough.
I bought an Arc PS8 (from mic10is) hoping the higher output voltage would help, but it really didn't. And while the Arc does have both TOSLINK and digital coax inputs, you have to buy a separate controller in order to use them - so I decided to sell it off, and I'm going back to my $275 C-DSP 6x8. So I'll be using the coax SPDIF for signal transfer - I was overall pretty happy with the C-DSP unit, just thought it could have been a source of noise.
Anyways, this Joying unit has 4 GB RAM and 64GB storage. No CD mechanism, but honestly, I couldn't care less. Prolly couldn't care less about radio, either, as 99.9% of everything I play is from an SD card, and the .1% left over is probably streaming Pandora from my phone. And I can put a 4G card in this unit, pay an extra monthly fee to StraightTalk and have maps, streaming, internet, whatever, independent of my phone, if I want.
I'm kind of excited. I found a nice video on YT of a guy who did a 1.5hr review with an O-scope, etc. The pre-out voltage wasn't impressive, but he did do a thorough review of when it clips at what frequencies, etc., and of the digital output. The RCAs need more output voltage for people who are going to use them without a line driver, but overall, I think it's a promising unit.
We'll see how it fares.