I just completed upgrading audio part of my HT system. Now, it's time to update DVD player. Currently, I have Sony 560D, and I'm happy with its picture quality. But, what I'm looking for from a new DVD player are DVD changer (since it's gonna double its duty as a CD player), playback CD-R, and progressive scan. Thing is 700P has last 2, while Sony's DVD changer doesn't do progressive scan and do first 2... So, I'd like to know, how big difference progressive scan DVD screen makes in terms of picture quality. (is it as big difference as between VHS and DVD?) Also, what other brand that I can try with all 3 features that I'm looking for under $500?