Agree about Furutech GTC-D, one of the best outlets out there, they provider real audible improvement over others including maestro, porter port and oyaide R1.
Denon1, I'd be very interested in more info regarding this impression. I tested the Maestro, Synergistic Tesla SE, Oyaide R1, and Hubbel 5632 (can't remember if this is the exact model), and selected the Maestro for both my source gear and power amp outlets.