@fire_water Dig your room. Wow. Great vibe, Well done. Take a bow. If you can stand it, then curtains on the glass and some other (wooden) sound treatments would kick the sound up a noticeable bit. Ironically likely the most improvement for the least amount of expenditure.
There are so so many great tube integrateds and separates to consider especially as you don’t need big power. My system pages shows what I’m partial too but that’s just me, just another voice on the interblab.
For tubes....If money no object, then Lamm. Air Tight is close to Lamm but more affordable followed by Shindo or vice versa. Pathos and Manely are good too. The Spatial Audio Lab low powered mono blocks and pre AMP will make your Klipsch LaScalas zing. There are many other fine low powered set amps too. At the least upgrading the crossovers and adding a pair of subs will rock your world. As I said above Klipsch LaScala can be upgraded or maybe something like, Volti Audio , Wolf von Langa Speakers or bigger Tannoy’s would further rock your world.
For Solid State your Accuphase would be hard to best.
If it were me, then I would do some room treatments first and think about the rest after.

