Quote Originally Posted by Sir Terrence the Terrible
It really depends on how well that room is acoustically treated, and how well your speakers can resolve fine detail. I setup my friends Klipsch quintet based 5.1 system, and you could hear the noticeable difference between DD and DTHD. His room is acoustically treated.

I have a 7.1 system in a 12x15x8 ft acoustically treated room based on upgraded ADS L-300 mini monitors, and you REALLY can the difference between lossy and lossless.
Thanks for the info.

Sounds like it would pay to rent a blu player and actually try it using the audio outs of the player and do an A/B comparison of the audio from the same source (yeah, ok, blu will do DD-HD, DTS-HD or DD via toslink). The TV will send DD via optical to the receiver so won't be switching between a DVD or blu player.