My setup is basically entry level(except the subwoofer I'd say). Pioneer VSX-D510 Paradigm Titans, Atoms and CC170 Adire Audio Tempest Ported 194L subwoofer I was experimenting with DSP modes on my receiver tonight. Before tonight I thought they were all very fake sounding and unconvincing. However, tonight I was playing the songs "Leila" and "Tears of Heaven" by Eric Clapton from the Unplugged albun. I used the concert hall mode and it was amazing. I couldn't believe how much the 5.1 DSP improved on the sound of the standard stereo playback. It just sounded much more believeable and lively. Do you guys find DSP modes in general are poor quality or are they worthwhile?