Warming up digital in my setup

My first thought it's your source. I haven't used an Iphone but USB isn't Apple's first choice of output and the USB cable length could also be a problem if you're trying to sit on the couch while listening.  I'm sure you don't want to hear this but it could also be a bad speaker / amplifier match.

I'm also an Amazon Music HD user and it sounds OK but not good Qobuz.  Saying that a lot of the music I enjoy just isn't on Qobuz so I dropped them.

+1 Soix regarding the MHDT Orchid.  It only outputs 16 bit but will accept 192/24 bit.  It was never a problem "sound wise" for me.

Consider reducing or eliminating speaker toe-in.

That dac sucks.

Re: Speakers - If I move to anything else, it will be the LS60 and ditch the Hint6 all together.  Parasound & KEF are a great match IMO.  Plus, I really don't want to mess around too much with speakers / amp because I'm finally getting what I want to hear out of my analog setup.  The LS50 are here to stay (for now at least!).

I could be wrong, but I don't think an analog source would be able to compensate for bad speaker placement or bad amp/speaker combination.  If it was a setup/pairing issue i'd also loose the depth and soundstage. 

Border Patrol, Orchid, Denafrips Aries have always been those next level DACs.  That's probably where I need to go.  DAC aside, would cable length, connector type really have that much impact?  

The following is just upgrading which should remove your issues. 
 

1. Better DAC - Schiit Yggdrasil if on tight budget

2. A real steamer using Qobuz at minimum Bluesound… better will help even more.

I’ve used a couple dozen different streamer / DAC combos over the last 20 years. I would not spend time worrying about cable lengths an connectors until you have upgraded and broken in my recommendations above for several hundred hours and know what they sound like.

My systems are shown for your reference.