Did they all fail at the same time? Sounds like a lightning strike. Your homeowner's insurance ought to cover replacements, minus the cost of your deductible.
If insurance will cover, then replace with an
Emotiva prepro and an array of cheap used amps (AudioSource AMP-100 or Niles SI-275 or similar). The Emotiva prepro has a 3 year warranty, and the amps ought to be cheap enough to replace as needed -- although I've been running the AudioSource and Niles amps for several years with nary a hiccup.
If it wasn't a lightning strike or you're looking for something cheaper than your deductible, just hit up craigslist for anything with the inputs you need.
I don't have a lot of confidence in the longevity of any popular avrs these days. They're all Chinese crap. The center channel went out on my Marantz some time ago, but I've been unable to find anyone locally who will service it. It seems replacement components are harder to come by now than they were a decade or two ago. Luckily I was able to kludge around the problem by attaching a spare amp to its center preamp out. But if any more channels fail there's a good chance I'll go the route I suggested above.