I’ve used McIntosh MC 611 600 W mono amps. I think a pair goes for 15,000.
In the solid state world these amplifiers perform extremely well. And amplifier is reliable.
If I was planning to spend more money I would definitely pursue a tube amplifier and I’m now using one but the 611 is very good
I would look at a VAC tube amplifier and maybe one from Conrad Johnson. I would definitely consider upgrading your pre-amplifier as I read up above. Spending $25,000 for an amplifier is pretty serious and it’s deserving of a higher level preamplifier
Have you considered buying a puppy?