In a way, I think Sony and Yamaha are kind of similar - neither one has great Room Correlation like Dirac, Audyssey, ARC.
Thus, for anyone who desires good room correction, I would eliminate both Yamaha and Sony.
Both Yamaha Avantage and Sony ES offer 5 YR Warranty on their AVR.
I love Yamaha for these reasons:
1. I think Yamaha may have the best reliability.
2. Best compatibility
3. Customer support and warranty
4. Definitely the best WiFi network remote app - MusicCast
5. Among the best network music streaming with MusicCast
6. I don’t use room correction. I believe people should try all room corrections if they are available. Doesn’t hurt. You can always turn them off. But I never preferred any room correction. So it doesn’t matter if Yamaha’s room correction is very good.