My brother tried the Topping amps and they were absolutely horrible. They retailed for around $ 1500.00 and he sent them back for a refund. Granted they were not fully broken in (about 50 hours). Also connections were funky and the build quality didnt inspire confidence.
I think you will find that the Fyne speakers and B & Ws present very different loads to amplifiers. I dont think this is the best comparison.