I had this debate with George on another thread, that concerned the purchase of an older Rowland amplifier. I have owned all kinds of amplifiers. Those that use mosfets, and those that use bjt devices. I am currently running a pair of mono blocks, designed by Hafler, that were made for the movie / cinema industry, that are, to my ears, amazing. They are biased in class A, run extremely hot, use Hitachi mosfets, and drive my Lascalas, wonderfully, and easily......If it sounds good to you, so be it.....also, when it comes to recordings, doesn't the microphones, cabling, recorders, mixing consoles, eq boards, compression boards, etc., all add to the final sound we are listening to ? I also believe, hard to drive speakers, are ridiculous.....have owned some, and, never again....