I'm with @russ69 -->
They sound wonderful together...
Can I throw this out there? There is no perfect hi-fi system, until you get a giant and very expensive system, they all have their limitations. Is there any way you can live with your power limitations? I had a system that could not play loud or BIG, after I sold it, I realized it was a mistake, it was a perfectly fine system and I let it go.
So true.
This is how we make the biggest mistakes. Want everything, and lose so much until we will arrive again at the "sound wonderful together" but at a higher level. Might take 20 years to get back to the level of enjoyment you have now... until then you will (might!) have higher power, but you will wonder why when the magic is lost.
I would start building a second system to overcome those limits.... and if cannot be solved, I still have the wonderful one.