I like this list, fun to look at. Funny how the higher into the stratosphere the amp is priced, the lower the SINAD. Not universally, but it sure seems prevalent. Altough in my experience there is a lot more to how an amplifier sounds that pure noise and distortion measurements. I think a looking at both measurements and subjective impressions, the reality is somewhere in the middle. Auditioning and listening to an amp in your system in your room with your speakers is also pretty mandatory when making a final decision whenever possible.
My amp happens to be towards the top of the list on that spreadsheet (NAD-C298), and I'm also very happy with what it's doing in my rig, but I'm sure there are amps out there that "may" not measure as well, and also "may" sound better to my ears. But it's always good to know that your gear also has specs that at least point towards a well engineered piece of equipment.
At any rate, great list. I'll be looking at it regularly.