Denon X1500 currently on close-out. Brand new with full warranty.I'm currently using an older Onkyo that doesn't have HDMI support. It's over 15 years old and still works great, so I was leaning towards that brand. I also hear good things about Yamaha.
I was considering the Onkyo TX-NR686 or 676. I'm not sure how much better "THX certified" really makes one sound.