Absolutely this. It seems imdb ratings almost skew to average being around a 7 and anything bad is a 6 or below. All of these sites leave me wanting but some are easier for shills to manipulate.

Payola has been around for quite some time

Oh no problem. I am absolutely no expert. If you max out the volume of the amp and the headphones are only moderately loud, you may want to get a more powerful amp.

As for the qualities, when I underpower a set of headphones, It is hard for me to really hear definition. Those 560s will surprise you with how fun they sound. Great Soundstage and way more low end than I expected from open backs.

That most likely is good, as the 560s is 120 ohm. Fiio makes some decent affordable headphone amps. I have the e10 and it has plenty of power for these. Try your amp first, it may work well with these.

I got the 560s a fee months ago and love them. I am driving them with a denon amp and they can take a bunch of power with no distortion to me. What are you going to drive them with?