I'm confused a little here. If you have 5.1 capability then you have either a Receiver or Pre-pro. Most HT processors come with DPL2 and/or other such surround processing for 2-ch material; why would you want it in your DVD player also? What the 5900 does have, which is alot more useful than surround processing for stereo (Yuck!) is an enhanced Bass mode, which allows your subwoofer to receive signal from your analog outputs for 2-ch.