I run my HD-DVD's via SPDIF and get 5.1 DD fine, audio sounds great to me!
Getting Blu-ray Friday - still gonna use SPDIF and get 5.1 DD. I would'nt worry to much about audio.
Ain't humans 95% visual creatures anyway

. (Dont quote me)
All joking aside HDaudio would be nice but im not prepared to spend £400 on an amp after not having my budget one for that long (2 yrs).
Is HDAudio leaps and bounds better that DD?