Tough one. A few observations and questions.
But, you can tale solace in the fact that, all else being pretty much equal, the overall sound of your system is governed by your speaker choices and their positioning in the listening room.
As long as you have sufficient power to drive them, you should be fine. And, since Klipsch is among the most effecient main stream speakers out there, any of the above units should do you well.
Since quality issues seem to loom large in your choices, why would you even look at refurbs? After all, they may have failed once already.
Let the features you need and/or desire determine your choice.
That being said, I've had a Denon 2802 for over two years now and it sounds great and I've had no troubles at all, aside from learning how to maximize all the features it offers but all HT receivers are like that. They take a little more edjumacation to use than a toaster oven. Learn to love your manual.
But, a final question looms heavily in my mind. If you knew of and were afraid of the stated "bright" tendencies of the Klipsch speakers, why did you buy them in the first place? If one doesn't like the sound of speakers before buying them, don't buy them. Don't expect another piece of gear to compensate for the failings of another. You may well be sorely disappointed since most of these receivers sound pretty much alike.
Understand, no guarantees are implied. This is just the ramblings of some guy on the 'net.
Good luck...
