Toshiba SD4800 Progressive-Scan DVD Player
Great bang for the buck
I don't pretend to be an expert, but when I replaced the Toshiba 5 disc player with the 4800, I couldn't believe the difference.  The picture on my Mitsubishi HDTV was sharper and more akin to what I had seen in the video store when I bought it.  I will never play cds, mp3s or anything like that on it.  For sheer entertainment, you can't beat it.