What to add or change for my system?


This is my first post, so please have pity on me if I break any rules.... :)

I immersed myself in this hobby a few years ago, and I'm completely hooked.  And best of all, my wife is.....almost hooked.  I initially purchased speakers from Axiom, OPPO 103D from OPPO, and Parasound preamp and amp from a local dealer.  These were connected with Kimber Timbre cables.  I also have a Furman Elite power conditioner.

All of that changed in December.  My system now consists of:
  • Martin Logan Summit X speakers; purcahsed new on AG
  • Plinius Hautonga integrated amp; purcahsed on AG
  • Oppo 105 that has been modded by Tweak Audio for even better audio; purchased on AG
  • Bryston BDP-1; purcahsed on AG
  • Gustard X20 DAC that has been modded by Tweak Audio; purcahsed on AG
  • Gustard U12 USB interface; purchsed new on Amazon
  • Clear Day silver speaker cables; direct from Paul, a wonderful person!
  • Avanti Audio interconnects; direct from Avanti
  • Furman Elite power conditioner; Audioadvisor

As luck would have it, I just got a nice bonus and feel the itch to add to, or make better my system.  Not knowing what to consider, I'm hopeful to get some suggestions from you.  If this was your system, and you had $3-4 thousand to spend, what you add or replace?

Thanks for your thoughts!!!
smills59
Other posters have already said it, but to add some weight to their words, three worthwhile considerations are room treatments, isolation feet (vibrapods and support cones worked wonders for me), and a Hubbell cryo'd receptacle all made remarkable differences in the fine tuning of my setup. 

With room treatments, it can be easy to spot what's add if a friend can help. All they have to do is hold a fuzzy fleece blanket in different parts of the room while you listen. You should be able to pinpoint which areas are reflecting sound the most and add treatment there. 

What are the dimensions of the room in question? How far apart are the speakers, and how far are you from them?
Welcome! smills59-

kick back and enjoy the music and your system for awhile. There is plenty of time to change out gear.  Before you do, consider, auditioning cabling (most important).

Happy Listening!
Do you have dedicated AC breakers and lines, going to your system/listening room’s outlets? I wasn’t so much surprised, as I was delighted, when I installed a couple runs of 10 AWG Romex(twisted together) to mine. And YES: room treatments/cabling!
smills59, I agree with many others here that the room has the greatest and most underappreciated effect on the sound you get from your system.  That said, many of us don't have a dedicated room so room decor (otherwise known as WAF!) plays a part too.  It sounds like you are blessed with a tolerant wife (I am too - up to a point) so you are lucky.  Search the forums for some low cost/free things you can do in your room (wall hangings, area rugs, plants, etc.) and experiment before spend big bucks on room treatments.
Agree with the others. If you feel satisfied at this time, enjoy it. One important thing to attend to if you haven't already is a good rack to put everything on. It does make a difference. I recommend Adona for sonics and adjustability.