This is my comment to Flysweep via pm:
"The crack is undeniably the best pairing for the 650. The lyr has dynamics and punch, but honestly it comes off as brutish and clumsy compared to the crack. The hair on my arms stood up when I cued up my playlist of test tracks. I'm done looking period. The crack is it."
I do still have affection for the lyr. When it comes to ortho dynamic hp's, the lyr is still my #1, but not for the 650.