Autoformers in the output stages in this day and age are silly. Why would you want an amplifier to deliver the same power in 8, 4 and 2 ohm loads and add all of that hysterisis to the output that isn't a problem for modern solidstate amplifiers. Build quality and aesthetics aside, I see little appeal to owning a Mcintosh amplifier product.
For me, adding to that is indeed the aesthetics. I can't tolerate the gaudy backlit green logos plastered together with the oversized blue meters. Oddly enough, a good portion of those who buy it also add to it posters and equally gaudy signs. All for amps of debatable performance and certainly questionable value.
I'll remain happy with my conservatively designed yet high functional Luxman gear.
Bose is another matter. Ethically, I can't stand them. My son worked for them in customer support, and was doing well when they shipped his job and that of some 350 of his coworkers to a subcontractor in the Philippines. I won't own any of their stuff.