Out of thousands of 876 owners, how many are AVS members actively posting here? Obviously, a small fraction. I think most of us would agree that the 876 has a design flaw that induces a repeatable failure. My guess is that there are many Onkyo xx6 owners we will never hear from in this forum who have suffered the same issue. So, it's not unreasonable to infer from the number of incidents posted here that Onkyo has a higher rate of failure compared to manufacturers producing AVRs with similar performance.
I had a TX-DS787 that performed flawlessly for nearly ten years, so I naturally gravitated to Onkyo when I sought a HDMI-equipped replacement, especially considering that I would spend at least twice as much on other brands for roughly equivalent performance.
I purchased the 876 knowing that it ran hot. I installed it in a closed cabinet, with three 120mm fans across the back of the top, and even built a shroud around it bisecting the cabinet interior to ensure the warm exhaust wouldn't mix with the cooler air being drawn into the forward vents.
My 876 has been humming along now for two years and four months without incident. However, if it does fail prematurely, I will report it here without histrionics, chalk it up to experience, and prepare to spend a much larger wad of cash to purchase a new AVR from a manufacturer whose products are known to be more reliable. (For what it's worth, "prematurely" in this instance means less than five years of service. For what I paid, that's about half a buck a day -- a true bargain. As of now, it has cost me a little over a buck a day, and that still seems like a solid value when I look at what our two newspapers cost, what our wireless plan costs, or (gulp) our daily expenditure for broadband internet and TV!)
While some here may feel others complain too much, it may be useful to remember that we all have our travails, and we each respond to them in our own way. It's not so useful to post purely argumentative comments. Live and let live, I say. Everyone take a breather, please!