Sanjay, I didn't change volume nor any other thing at the configuation manual , but only flipped those surround modes. It appears to me the DTS Neo6 and DTS+PLIIx that change 5.1 to 7.1, do no littel good to SOUND QUALITY other than giving us 2 extra back surround.
My room is not small, but +15 feet wide x +30 feet long. I am using Paradigm studio 100 front, CC450 center, studio 20 as side and atom at the back. I set front L/R to large and others to small with crossover 100 Hz at center and 100 at side and 150 at the back. I still say that applying the surround mode that the source provide would be the best surround mode to choose.

Kwok