AD825 has been my favorite opamp for quite some time. But seeing the new trend of LM49720, I think it’s gonna be a good idea to have a try.
From my experience, AD825 should give a warmer sound with analogue touch. While LM49720 should have a modern touch with good high extension. I’m not saying who is gonna be the winner, but the test in next several days (or weeks) should gonna be (very) interesting.