Actually, those were just the brands that came off the top of my head. I would include Orion HCCA amps in the same league the names you mentioned when it comes to power. Really the distinction between most of the amps is blurred. My McIntosh would not be good to use in an SPL car just as MMATS would not be good to use in a SQ car. Just my opinion that I have not heard a Class D amp that sounded quite as good as a high quality Class A/B amp.

When it comes to created huge amounts of bass effeciently, class D is the way to go.

In regards to SQ, the best sounding systems I've heard had 5 brands. The five mentioned in my first two groups of amps.

I consider MTX to be one of the best values on the market. RF has very good SQ, but a price tag to go with it.

Like I said, depending on the application, I would probably come up with a different list everytime.

Dave Newman