I'll state one thing where you've made an assumption. - phones I've had - Audeze LCD-2 and X, T90, AKG K712, various Fischers, K702, DT770, DT880 600 ohm, various IEM's.. Phones I've auditioned at length and didn't buy, HD650, T1, HD800, Mad Dogs (all), Grado GS1000i, Pandora Hope VI, DT990, and many, many more.
Amps I've owned. Woo WA22, fully balanced, with extra expense on tubes, Burson Soloist, Schiit Valhalla Lyr, various portables. Audio GD 15.32. Listened to.. Pretty much all the Woos, Conductors, Violectrics, etc.
So, I've had very good exposure to the high end. Even listened to an Abyss. I don't mind at all when people disagree with me. But I'm not wrong as this is a subjective hobby, and my ears are connected to my brain, so it's how the music is interpreted by me. Sure the details on my profile aren't listed,
No phone is perfect. That's impossible. Otherwise I wouldn't have spent so much bleeding money! As for the HD650, without sounding OTT, is a piece of garbage to my ears. Hate it! It's like having two pillows over my head. Muffled, and sluggish. I've heard the 650's hooked up to top end amplification, before you ask, and I prefer the 700's hands down. The LCD-2, if I could cope with the weight, is superior to the HD650 to my ears.