Tweaks that work? (yes very subjective topic)

 Thanks for the answers...
Leg of panel is not same as circuit, but computer on same circuit as analog is something I would attend to including consider a second Furman for any digital component. I would also plug the amp direct into the wall and at a bare minimum get a high clamping Force Hubble outlet. Instead of rug try a ceiling treatment instead or several oversized/ over stuff fabric ottomans you can move into the floor bounce area. But the first thing I would do is get the amp direct to the wall. I have three of the 15 model power conditioners, none of my amps sound better thru them.
your dealer I know thru reputation from both customers and supplier, I think you can trust the table setup :-)
but that is a skill you would want to acquire along w tools to do it.
have fun enjoy the music
jim

   "the phono stage is in the 390 and it is the 310LP"

internal phonostage? You may be surprised how an outboard unit can be a game changer. Your setup appears solid, but that is where I would look for possible, significant improvements. 

From the audiogeek perspective, that is the compromise-internal phonostage. I would be steering my time and wallet towards a separate box. Try and demo things to see if your ears agree. Ever hear a tube unit thru your system? Could possibly add some "life" you didn't know was missing. Personally, I lean toward all tube setups.

Records and tubes are what create "that sound" I constantly chase after.

Subjective, of course. There are plenty of tube vs SS threads that go nowhere.

If that were my setup-better phonostage which will eventually show off an Apheta cart. Now you're done, until you get the P10.

I've got a lot of noise on the line, so PS Audio noise harvesters and ifi noise filters made a perceivable improvement.  

millercarbon must own stock in BDR cones. He mentions them in a lot of his posts.
Waiting for another snide comment???