I just received a brand new Beyer T1 ($760) and they are great. I also have HE-500 that are great. What's really impressive is how my K712 hangs right there with the other 2.
AKG really nailed it with K712 IMO. They are some of the most balanced cans I've ever listened to, much better than my Q701. I am not a graph reader or believer. Audio is just too subjective and obviously everyone's hearing capability is different.
The K712 is stellar with Emotiva MiniX A-100 speaker taps and Lyr too. The bass control is unbelievable. Best AKG I've ever heard.
I could easily live with a $380 K712 and $220 MiniX............champagne audio on a beer budget. Great job AKG!
I've listened to many headphones at this point and have concluded the point of diminishing returns for my ears is $700, so it's really great to see K712 so strong.