I am going to put the Denon AVR-X4800H on my recommended list.
So, people should use their brains and understand the review rather than thinking "recommend good, not recommended bad". This post IS NOT a criticism of the recommendation.
That said, I do feel like it's important to note that the amplifier performance of the 4800H is not that much different than the 3800H. The HDMI-in amplifier SINAD is ~84.5dB(3800) vs ~86dB(4800).
SNR for the 3800H is actually better than the 4800H. (not clear if this is a valid comparison due to ground loop?)
The power difference is minimal with the 3800H at 114W(8 ohm), 135W(4 ohm) both channels driven, and the 4800H at 134W & 175W respectively. This is only about 30% more, which might get you 1dB of extra output?
So, while the DAC SINAD on the 4800H is surprisingly improved a decent amount at 95dB vs 87dB, considering this is distortion-dominated SINAD I can't see how it would be a good choice for anyone who was considering the 3800H to run out and pay the premium for the 4800H.