Bittersweet weekend... I handed down my perfectly functioning 876 to my son for his new man-cave theater. His (also perfectly functioning) 806 that was scheduled to go into the theater met an untimely death when it went up in flames (quite literally) due to an errant screw placed into a wall. I know that others have not been so lucky with their 876s, and I won't pretend that Onkyo didn't have some issues with them, but my 876 has over 20,000 hours of use on it (based on the cumulative hours of the three TVs it has functioned hand-in-hand with) and it's never given me the slightest bit of trouble. I kept it cool with a dual fan Comcool set up that kept it running in the low 30°C range rather than the low 60°C range it ran at without the external fans.
I've replaced the 876 with a TX-NR1010... so far so good. Love the network audio features, the simplified HDMI cabling for 3d sources, and the MultEq XT32 and dual sub setup. I'm less impressed with the addition of height channels to my system. The 1010 also does not give me the 876's option to run my fronts in BTL mode even though my SB channels are still sitting unused. The other "downgrade" in the 1010 is the lack of a switched outlet to power the cooling fans. I can only hope for as good a reliability record as the 876 gave to me, and my even older TX-NR801 is still giving to me.
Commercial AV Design Engineer, CTS-D Certified
TWC-Charlotte, 8640HDC/ODN 7.2.0_11