Brad:
"Is it worth upgrading to a progressive scan DVD player"??
In a nutshell......... YES!!!!!!! In fact, if you have a 16:9 HDTV Widescreen Television, you can get a good progressive scan player for peanuts right now. You can get either a used Pioneer Elite DV-37 for about $400.00 to about $450.00, or you can get a used Sony DVP-S9000ES for about $700.00. Right now, you cannot go wrong with these two players. Either of these two players ought to serve you well until the new HD DVD Players hit the market in about two years or so. Until that happens, these two ought to do until then.
Good Luck.........
--Charles--