I had better luck with Sony ES. I had sent in a 7100 receiver in to get updated. It came back damaged from shipping. Sony sent me a new 6400ES unit as a replacement. The five year warranty is pretty good, and that does get honored.
I agree with the Oppo service. I had to send in my two year old modwright 95 for service, and they fixed it for free, no questions asked. Hard to beat that.