Denon 2800 vs 2200

What are the differences between the Denon 2800 and 2200 DVD players in terms of audio and video performance. I have the 2800 and wonder if it would be worthwhile to upgrade to the 2200. I use my 2800 80% of the time to listen to CD's and 20% of the time to watch DVD's I do not have any SACD or DVD audio discs. Thanks