OK - Now What…?

I would invest in better cables - Power, speaker and interconnects
 - the Triode Wire Connectors are not doing justice to the Diablo and the rest of the rig

Take a look at Inakustik

Just my opinion - Steve

You can get much better resolution for Sure 
with much better audio cables Wireworld 8 Platinum are night and day better that I can assure you if you truly want to get the most 
out of it ,call Galen Carol audio ,hegices good deal if you buy 
interconnects, and speaker cables together . With a system 
of that quality your cables are your biggest weak link 
and if your streamer has a dac  output ,a external dac outut , in the $5k-6k range Denafrips Terminator+, Holo springs May KTE
or Audio Gd  R7 HE MK2 ,with external 10 MHz master clock all 
range all are substantially better on every level then the Aurender 
in absolute terms . A great streamer ,Melco N10,then  great dac 
your system then would be on another level still ,having heard these all in depth including the Aurender A10 .  My brother has the Gryphon Diablo300 great integrated amp he has the Great DCS Rossini dac which is the best I have heard under $50 k.. Having 40:years in audio and having owned a Audio store  has given me many listening venues to compare gear with other Audiophile clubs.

If you are "absolutely thrilled with the sound of this system", there is only one question you need to answer.  Will the tiny improvement in sound, that buying new equipment MIGHT give you, be completely drowned out by the sound of your money flying out the window????   I have personally dolled out thousands of dollars on the promise that I would hear the difference, only to end up with yet another upgrade to my system, but no discernable improvement to the sound.   

have you considered upgrading your DAC?  Don’t get me wrong, the Aurender has a nice reputation, but is it in the same league as your amp and speakers?  Purely on the basis of $, maybe not.  A good friend of mine has dCS Bartok, and it’s extraordinary. I also agree with others about getting back into vinyl.  Over 90% of my listening is vinyl. (Of course, i’ve also spent 15:1 on vinyl v digital.)

As long as free advice is being given out, as soon as your done with the Sea Bass ala Ben, check out Darwin speaker cables. I think they still have the lowest capacitance in the market at 7.2pf/ft, which accounts for their speed and openness. 

They don't believe in the myth that cables are tone controls and should just get the heck out of the way of the music. Practically everything else out there is just a variation on a theme. 

There are vendors at audio shows that only use their cables so their stuff sounds good. Check out their design philosophy at their site and there's really no mumbo-jumbo, just how they see things and a peek into how they build them.

All the best,
Nonoise