I found what I think is a great deal on the Onkyo TX-NR709. But, I'm not sure whether I should keep it or keep the Yamaha RX-V1065. I have a Panasonic TC-P55GT30, so the Onkyo has the advantage of 3D even though I doubt I'll use it. I'm assuming the Marvell Qdeo video processing will be an upgrade. Obviously, I'm concerned about sound quality as well. Can anyone give me any insight/recommendation?