The 803 was definitely the superior system. The sound quality in my old T5 was top notch for a factory system. The 850, with PL II, should have been even better, but it doesn't sound anywhere near as good. While not a *bad* system, it lacks the punch of the 803.<p>Not sure whether they cheaped out on the speakers, the amp, or if they simply didn't tune the sound processing enough on the '05+ models, but there is a significant degradation of sound quality. I complained to the dealer when my car was new, and they looked at me like I was <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0">