I have been using the 975 for about 8 months now and have been very impressed with it. I am, however, wondering what the best thing would be to use to get some effect like the room correction software offers. I assume you should be using a stand alone EQ or some such, but until now I have never really been exposed to a need for one.
My inquiry now is only because I was at by friend's place yesterday and he is using a Marantz 7007 receiver with the same speakers as I am and his sounded more robust in the mid and low frequencies than mine with the Audyssey engaged. Overall, the 975 sounds better and more pleasant, but the Audyssey added something that I just can't reproduce with the 975. With his Audyssey turned off, his system sounded like the slightly inferior, but still nice sounding, system that we both expected it to be in comparison. It was more robust with it on though so I need to figure out how best to add that element to mine.