What can I do to improve my 2nd system?

@lewm You intrigue me to dig into the decoupler/isolator subject. Here are articles, some support it and some don't. Please take it with a grain of salt. I went through several bookshelfs, starting from my 1st (NHT SuperOne 2.1) 25 years ago, Tannoy Mercury F1, Sony SSCS 5 and currently this Elac. I placed the IsoNode isolator underneath without a second thought back then because, just like many others, I heard noticeable difference in bass, tighter and cleaner. The effect on the subwoofer is even more pronounced. I think very few audiophiles will debate the benefit of using damping isolators under the subwoofer. I compared the $50 SVS Soundpath isolators with $3.5 a set of four damping isolators you could get from Walmart.  Very subtle different.  As a band bass player a band in college, I could testify that is not a placebo effect.  

I place the similar IsoNode isolators under the gears including CD/SACD player to reduce the vibration.  With that, the gap under the player has increased to 1+ inch to help dissicipate the heat from Parasound to answer @slaw, although I do agree a audio grade rack placing them individually will be more ideal.  BTW, the heat from Parasound PA is much less than the Cambridge IA I had for being a similar class A/B design.

https://www.pro-tools-expert.com/production-expert-1/2019/5/23/speaker-isolation-fact-or-bullshit-we-have-the-results-from-the-poll?mc_cid=2a1503e520&mc_eid=f10a2ce15b

http://ethanwiner.com/speaker_isolation.htm

Without first hand examination of these devices, it is hard to say whether they preserve a rigid mount of the speaker while also providing some isolation, or whether they permit too much motion at the speaker base.  I did take a look at the Magico website. The footers on their speakers actually would seem to add stability to the cabinets, while also attempting to isolate the speaker from the floor.  If so, I certainly have no issue.  Like I said, I take issue with rubbery or springy speaker mounts.  But springy could work OK if the springs are very compressed under load so as to minimize the potential for amplifier energy to generate cabinet motion. I suppose it's a trade-off.

the wall color for sure

get headphones with a dedicated amp....will be better sound than your current system.

@erik_squires Finally got home after a long drive.  Play "The Wild Heart of the Earth" by Cécile Verny Quartet from Fear and Faith (album) to test out the "crossing in front of the listener" idea.  Immediately the first impression is the shrinkage of the sound stage.  Switching back to slight toe-in position and everything gets back to normal.  Sorry, Erik, as much as I appreciate the thought, I am not sold on this thinking outside the box idea.  However, with the height of the stands, I was actually listening below the vertical axis of tweeter all the time when I lean back on the recliner.

@stringreen I do not disagree the magic power of a good paring of headset and dedicated amp.  However, I could not endure wearing headset or In-ear even for half hour.  The discomfort from even a high-end headphone just sets off my enjoyment of music listening.