I always overpower my speakers since I rarely listen to them at full blast. I always prefer SQL than SPL. I am currently running some Eclipse ICE Amps and pair of Dynaudio Esotec for the front stage and ID CX54 for back fill and they sound nice and clear, aided with a good pair of Hertz ES300 12" SW's pounding away..
That is a nice amp you have there. All high end units need a good amount of power to reproduce the music like it should.