Bad case of upgrade fever

I just added some acoustic panels to my listening room and I'm amazed at the difference they make.  I hear more detail, and the bass is so much more defined.  Can't believe I waited this long to do that, and it was pretty inexpensive.  Used panels from Acoustimax.  They look nice, and do a great job.  But now I want more...

My system:

• Martin Logan Summit X speakers.
  
• Gustard X20u DAC that has level 2 mods by Rick Shultz
  
• Oppo 103D that I use for CDs and SACDs that also was modded by Rick Shultz
  
• Plinius Hautonga integrated amplifier (I upgraded the fuses)
  
• Bryston BDP-1 as a music streamer
• Avanti Audio interconnects
  
• Clear Day speaker cables
  
• And now, I've added acoustic panels and bass traps
  

I listen mostly to POP, Jazz, female Jazz, and Blues.  Pretty soft and mellow stuff.  I stream Tidal, and have a nice collection of SACDs.  All my original CDs were moved to Flac files.  

I have around $5000 to spend, and hope to sell what I replace on Audigon.

I'm thinking I should upgrade the Plinius, but not sure to what.  I've been looking at the Primaluna Dialogue HP Integrated, but not sure about tubes.  I've also thought about moving into turntables, but I have no albums and really don't want to get into that quagmire right now.  I know myself, and if I start down that road, my wife will divorce me...

I very much appreciate your help with my next purchase.  What do you think I should replace, and what do you suggest I replace it with.  Most of my equipment was purchased right here on Audiogon and I have never had an issue with anything I purchased, so I have no problem purchasing this upgrade as previously owned.

Thanks so much for your help!