Brian, welcome. We've all been wondering when we'd get your first post! Seriously though, your thoughts certainly should be helpful. All channel(5/7)stereo isn't intended for general use with 2-channel music sources. As was pointed out, it simply duplicates the mains at equal loudness in the surrounds and is sometimes suggested for a "party" situation to give a more nearly equal listening experience to listeners scattered about the room. A more "natural" surround experience is provided by a mode such as DPLII, which doesn't duplicate the fronts in the surrounds, but instead extracts surround ambience from the fronts which is slightly lower in level, delayed in time and lower in treble, and directs it to the surrounds where it belongs, providing a bit more realistic listening experience. I use essentially the same settings that you do, except that on most material I set Dimension on 3.
Ortho, the calibration appears to be correct, and the problem may well be the mode(which you don't specify)which you're using for music. As indicated above, 5-channel stereo(or any simulated modes such as Jazz Club, Beer Garden, Sportin' House, etc.)shouldn't be used for general music listening. Instead use DPLII to send surround ambience to your side surrounds(not "rears").
