I had the Rotel 990bx (200/ch) a while back. It was a big step from the late 80's Adcom it replaced. The Rotel was a real powerhouse (bet it would work well for woofers in a vertical bi-amp).
I switched from the Rotel to a DNA-1 and that was big step up. The McCormack is far more refined, big reduction in grain. This reminds me that I need to sell the DNA-1 at some point.
I now use an Edge NL10.1, which is a major step up in cost.
Also tried the Belles 150 and Belles 150A Hotrod. The former is very smooth, the Hotrod adds more resolution, but falls short of the DNA-1, IMO. Also tried a Plinius and found the DNA-1 to be smoother.