Eric, enjoy your new setup. As to music in 2.0 sounding "unnatural", that's because it is. Despite the misconceptions of enthusiasts who maintain a separate 2-channel system so that they can hear music as it was "intended" to be heard, listeners at live concerts hear the majority of sound as ambience from directions other than the front. Using modes such as DPLII to extract the ambience from 2-channel source material and send it to the surrounds where it belongs brings us closer to realism in home listening.
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Enjoy the music, not the equipment.