That AMP is a beast. Agree with Jakewash that the room environment could be part of the issue. You could try a local A/V outfit for an assesment.

If you still want more power, I would get an Emotiva XPA-2 or XPA-3 (based on your 1000$ budget).

SC-05, HLT6189, Oppo BDP-93, Blue Circle Audio FX2
Axiom M2v3's, QS8v3's