I will end up buying new, but will wait until I am satisfied this issue is not a design flaw that is being suppressed by Denon.
About two years ago, I cranked my 5600 and caused the overprotection limit to shut down the unit. It is in my living area. Sadly, to this day, I do not have the power output or quality sound I used to. The overprotect kicks on all the time. I can't justify the price of the bigger AVR and don't need the zones. I have my 2801 in the master bedroom. I use it for surround, via in-ceiling speakers and a Kenwood 12" sub, speakers in the master bath, and two seperately controlled pairs of outdoor speakers. In the past, with guests, not having volume control to outdoor speakers, which I do now, necessitated this setup and I do like it. I moved six years ago and was able to add wiring into this place when we did a remodel about 4 years ago. I want my next receiver to be useable for future expansion and moves. I am investing all new purchases for 3D and such. I don't know if I'll ever go to a 7.xxx, but perhaps next time.
Right now, in the large living area, I have a 14" in wall sub(Difinitive) and some Sonance 8" 3-way speakers. PC, 3D BD player, and satellite. Everything is hooked to a wireless gaming router, though I don't play games. I have all cables going into the wall and up to my TV and ceiling. I cannot justify to my wife to get the 5xxx series or an 80" 3D HDTV, yet.
Now, back to that 3312. It still concerns me, because that is the one I want and if there is a known issue, I want to know that if it occurs, while I own it, Denon will pay for the shipment to them. I'm not yet convinced it is only a refurb issue. A 3 year warranty is nice, but not if I have to spend $50-$70 to get it to them for repair.