Can the room handle larger 3 way speakers?
IF so, I recommend you 1st change speakers, 3 way, more efficient, at least 90 sensitivity.
Your existing equipment might sound terrific and NOT fatiguing. with different speakers.
Tubes are wonderful sounding, my preference, however it is a dance between speaker’s efficiency and ’enough’ power for sudden demanding bursts.
If you find a horn speaker with high efficiency you like, you can use less power, but caution, not too little.
IF your room cannot handle a bigger speaker, I have a compact 3 way suggestion based on recent experience.
compact 3 way AR-2ax, 91 sensitivity, size: 11.5 deep; 13 wide; 24 long. and fully restore them (or have them restored, or pay more for a fully restored pair. Big asset: built-in level controls for the tweeter and the mid-range so you can adjust them to your space.
I bought a pair, for nostalgic reasons, was going to use them in the shop. bought 250. ship 250, parts capacitors, 4 new level controls, 2 new tweeters 250, total 750.
They sound soo good I moved them to my office, driving with little luxman 10wpc tube amp. So good I just bought a 2nd pair for the shop, restoring them now, just need capacitors for crossover and 4 level controls. Larger room I would want at least 30 wpc, preferably 45 wpc range.
Tube amps: less needed power has many advantages: less initial cost; smaller size; less heat; more placement options; consider line of sight if remote, less replacement tubes cost (they last 10,000 hrs, for me 14 years, so if you replace them every 7 years, it’s no big deal.
Anyone going tubes, I recommend buying a simple tube tester of your own.
If you can see my virtual systems, I show the AR-2ax restoration there.
https://systems.audiogon.com/systems/10092
bigger efficient horns with 45wpc tubes here
https://systems.audiogon.com/systems/9511