I learned one thing : the way we learn how to install any system together in a room matter way more than the separate piece of gear and their price tags... ( basic synergy for sure matter it is a starting point )
The second thing , there is no way for me to understand with my ears how to improve my system by buying pieces of gear for a so called "upgrade" ...For sure the soundfield may improve with any upgrade but it is not enough at all ...
Acoustics experiments, vibrations-resonance controls and electrical noise floor decreased are the three goals...Nevermind what is the cost of your system...😊
Once this is understood you can be happy even with a relatively low cost system...
But probably a costlier system than mine will be needed ... Why ? Because my speakers shine once modified and my headphone shine once modified... Then without modifications the cost for the same S.Q. will be much higher .,..But at a relatively low cost anyway if you learn the basic you will cure upgraditis ... ...