Does a "upconverting" AVR [component and composite in particular] really work? Or is it more of a marketing stradegy? I've been researching some of this out, but would rather hear it from everyone who has actually seen the difference first hand. In particular, provider feeds. [ I know about "source feed" receiver resolution, etc, etc,] and finicky dvd players. Does upscalling actually work? Also, anyone have a opinion on Maranz? SQ, reliability? The reviews on this brand don't seem to be as harsh as say,onkyo or yamaha. Of course the top end whatever brand gets good [ but fewer reviews] I'm just not looking to spend those very big bucks. Have a old denon with SQ that I'm happy with. I understand that different brands will produce different qualities, I just don't want to go backwards.