Today my Apple TV into the HD621 by HDMI sound better than the Enesemble
and in my opinion better than my now "thank God " sold 808.
PerS
I assume that your comments are precise and refer to the 808 and not the 808.2?
I meant my 808.2i.
The HD621 has the same apodizing filter - the 808.2i has to read the CD - then error correct it -.
All that are on my Apple TV has been lossless ripped with Max with the error-correcting power of cdparanoia. That means that all is bit perfect.
Some CD tracks can take 2-4 minutes before beeing imported because of the error-correcting of cdparanoia. The 808.2i does this on the spot

Me and some friends with similar setup listed to them both en concluded that
Apple TV HD621 combo had more detail in the top range and sound image seemed to be more defined in my setup.
The best about our "hobby" is that what is best for me might not be the same for others.
PerS