As far as post processing is concerned, Chas is correct. If you have the receiver decode the new formats, you cannot do post processing. My PS3 does the processing and sends the signal over as LPCM to my Marantz 5003 and then I can apply the post processing. It allows me to do Pro Logic II and turn my 5.1 into 7.1 and it allows me to do the Audyssey to the signal! So it works very well for me! It is the same with the 6003 too. Love the sound!