Hard-core gear maker Krell makes a poweful argument with KAV-250a and KAV-250a/3.
Since their inception some 20 years ago, Krell has remained about as hard-core of an audiophile company as you're likely to find. Back in 1980, Krell shocked the hi-fi world with their enormous KSA-100. Since then, they have remained on the cutting edge of solid-state electronics. Just when you thought they couldn't push things any further, they would obliterate the competition with some unimaginably huge and powerful beast. The most recent example of this is the Master Reference series that they describe as being "mini-sized," but I think they must have been comparing the amps with a British car.