From logical stand point the most expensive , factory amplified home speakers can't exceed ~20k USD. But music is emotional thing , that's why we cant understand and agree each others :)
Speakers and amplifiers show audiophiles are confused.
An audiophile buys a pair of speakers for $50K or $100K then asks what amps make them sound best. That’s about as smart as marrying a girl without knowing her personality. What are the specs that will insure your expensive new speakers and amps will work optimality with each other? There’s got to be an app for that, well no there isn’t because there are too many variables and companies don’t present their specs in a standard ways. Why is it that speaker and amplifier manufactures don’t recommend specific amps for their speakers? Beyond power, impedance, and making your own crossovers how do you choose amplifiers to get all the potential out of your speakers?