I don't know it still to be true, but in the past, the SR60XX and SR70XX series shared teh same amp section as revealed by Bench testing (they only claimed less power from teh 60XX series to try to help people feel like they were getting more for the extra money, but it was features that made teh difference, not watts)
Here is the distortion chart for the SR7011:
The ATI Monoprice Monolith:
$9500 Krell amp:
Low to mid level Denon ($600 MSRP):
Interesting that the $9500 Krell and the $600 Denon are the only two that never get below 0.005% distortion!
Admittedly, these charts are probably at a specific frequency, but I'd still expect a pretty high correlation between single frequency distortion performance (which I guess is what this is) and full rage distortion performance!