Thanks for the replies everyone. The whole thing seems to lack beautiful and decisive science.

I went to demo a 525 and 3803 at different stores. The 525 was hooked up to some really nice Cambridge, 300 watt $2000 pair of speakers, and sounded really nice. The center was underwhelming but the speakers and their integrated subs delivered clothes rumbling bass. At reference levels it was loud but not crazy loud. The 3803 was hooked up to some shitty speakers, and of course the salesman was a jackass. I prefer the 525 aesthetically but the video upconverstion of the 3803 is appealing. Does anyone know how it scales 4:3 compositve/svideo signals into 16:9? My TV can't do component 720 at 4:3, only 16:9. I'm guessing it adds black bars. How does the 525 work in the situation--with multiple low res/composite/s-video inputs and one component out?