Late to the party as usual. Once the setup is calibrated, take the time to write down the settings for each speaker. I have found over time that tweaking the center, the two fronts or the QS8s by a db or two in a given situation makes a big difference. As Alan pointed out, there are are lots of variables in play where the audio is recorded. Nothing wron with a bit of manual intervention from time to time. Having the settings written down allow you to get everything back to where it was as needed.
I am lucky to have the Denon 3803 and MX-700 Home Theater remote. The combination allows me to control each speaker up/down by 1/2 db at a time directly from the remote. Having this control over the sub is just a small slice of heaven. Hope this helps.
