Is it me? Will I ever be satisfied?

Getting great sound can be challenging. Given what you have said there are at least three entry points to start answering your question.

I have been at this fifty years and over the last few decades have reached great plateaus where I was really happy… before I was able to afford another upgrade cycle. I have the best system I have ever heard to my tastes (my UserID).

First, what kind of sound do you want? There were a number of experiences in my history that stuck out. They were incredibly musical systems where I was completely sucked into the music… is this perhaps it? You get detail, slam, imaging but it just doesn’t have an emotional connection? I recommend you visit some showrooms. You want to experience the extremes… high end all tube system, planar speaker system, all MAC. If you have a sound to shoot for, it will save a lot of time and money. I was sidetracked looking for details and slam for a long time… at the expense of musicality (rhythm and pace)… an easy trap.

You have a heterogeneous collection of equipment… all of which have loyal fans and are highly regarded, however. Levinson has a very specific sound, accurate well balanced but very sterile to my ear. MAC has a very distinctive sound, heavy midrange and bass, short on details (great for rock).. I can’t imaging these components are synergistic.

Your listing position / room. Lots to do here. 12’ apart is too much. Try an equilateral triangle about 6’ to start. Speakers away from the wall. Room treatments … behind + at reflections and behind. Spend a lot of time here.

Interconnects are not going to fix the problem. Once you have the sound you want, then get more into that stuff.

Your Bluesound is good for the money… but is a really budget piece of gear.  

So, if it was my system. This is what I would do.

1) Work to get the most out of your current system through room treatments and positioning (toe in).

2) Survey the sonic possibilities… to identify the sound you want. Listen to high end systems… to identify the sound… you can achieve a similar sound at a much smaller budget… this will tune your ear to what you want and sonic differences.

3) Read The Absolute Sound and Stereophile to familiarize yourself with possible components to move you in the direction you want to go. Read Robert Harley’s The Compete Guide to High End audio. Take your time. Enjoy the journey.

4) Swap out one component at a time moving in the direction you want to go. Evaluate… did it do what you wanted to do?

You didn’t mention what volume you enjoy but in a big room, you probably need that big power. At more moderate levels, You might try a good tube amp & see if you like the sound. It should be very different, more air, more body, richer tone if those are to your liking. Actual bigger power & really good sound in tubes does cost some decent $. It’s a real credit to Levinson & other well made stuff that they last so long & considering that, aren’t as expensive as they might seem. 

I would ask just what are you listening to to judge how good your system is?  If you were born in 1944 is your reference point mid-60’s jazz and classical, or Grateful Dead and Jefferson Airplane?  Either way, I would want more speaker than your 804s to deliver the goods in a 25’x20’ space.  No substitute for cone area.  Look into Revel F328Be or others of that scale. 

Thank you all of you for the amazing feedback and knowledge.  I am not new to this life style.  I do have multiple systems in my house.  I am fortunate that I have a dealer in Seattle where I listen to a $1m system of Dan D’Agostino  and Wilson Audio and have been working with the same guy for years. 
 

I agree that the room is a big culprit.  I have thought about moving this system, but my wife and I really enjoy the space and the view.

I am enjoying spending time getting to know this system as it is really new - to me.  I just changed out the tubes 2 weeks ago and have only spent 4 hours listening to it.  

On another note, I listen to everything except country/western and rap.