I don't see any high frequency brightness either. In fact, got a really nice, flattish (+/- 2dB) plot, with gentle high frequency roll-off after Audyssey, as checked by REW. In fact, the only problem is too high base for some reason after EQ. This is easily fixed by some base trim. Music and movies sound big and bold, as compared to my CM9s.
I went back and forth between the Emotiva XPA-3, the Denon by itself, and even my desktop Aiyima A08 for the fronts. I know they are supposed to sound the same, but at similar volume (checked by both a Umik-1 and an ASM-1 SPL meter), the Aiyima sounded more "effortless", followed by the Denon, followed by the Emotiva.
Based on some SPL calculations, and allowing for Audyssey reducing max volume by 10dB, I figured I need somewhere between 40 to 80 watts for the fronts. For now, I am using the Emotiva, but am still thinking about an amp upgrade. That 0.1% THD spec for the Emotiva still bothers me, even though I probably can't hear it.