I have a 500w and a 1000. The 500 is nice becuase its the standard size of a home theater device (same size as my reciever, vcr, etc.) and it has an lcd. the 1000 is small, no lcd. but it is firmware upgradable (can be made region free, and can change back ground image) The onscreen mp3 player is MUCH nicer, and it also supports .VOB files, they are a 5.1 video/audeo file. I'm assuming the 1100 is about the same as the 1000 but different color and a newer firmware.