Hi Whipper, I had the same nice-to-have problem and also settled on DPLII processing for 2 channel source material. I played around with various settings like the center width etc... I did post my findings at some point, if I can find it again I'll post the link. The biggest thing for me to make sure it sounds right is to ensure I did not leave my center channel bumped up a couple of dB from movie watching when sitting down to music. blush
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Dan
In/On Wall 500 w M2 Center Channel