Yeah, there is an immediately noticable differencee, I've blind tested it on friends at my place a few times, and they always pick the PCM track. But for a normal TV or 'all in one' surround system, the difference would be irrelevant. I'll be keeping the PCM track, have no interest whatsoever in doing a SL disc, if anyone wants one they could alwyas dvdrecode or dvdshrink the thing.