Bob raises an excellent point (and you thought you were just chopped liver, bob... ). I generally use the 950's Cirrus Extra Surround processing for any surround signal (two channel processed with Pro Logic II, Dolby Digital, or DTS). I do use DTS's ES mode some instead of CES, but over the last couple years I've gotten to the point that I rely almost solely on CES for Dolby Digital sources (partly due to laziness, but also because CES has proven to me to be good enough to justify that laziness).