After owning many different amps, I have found the Michi 8 mono blocks to be the best in performance and cost ($15,000 for the pair). And they just added a software/firmware upgrade with some really cool looking VU meters.
Below is a review by Michael Fremer in Stereophile in which he compared the Michi 8 to his very expensive darTZeel NHB-468’s amps. ($170,000/pair)
Rotel Michi M8 monoblock power amplifier | Stereophile.com
ozzy