I am stressing over which one to purchase since both can be had online for about the same price. I have a pretty nice home theater but a remote has always been the last thing on my mind. A buddy has the Sony 2100 remote and was telling me about the things it can do and that I could toss my half-dozen remotes with a purchase of the right one. I have looked over the www.remotecentral.com website as well as a few others. The MX-500 seems to be getting better reviews than the RMAV3000 but I just want to be sure. I have no idea which one is newer. My friend tells me that macros are where its at but I truly have little knowledge about this stuff. I read the reviews and most of the extras & functions that they talk about I don't understand (I do better when it's in my hands). I have done some searches but have not seen any direct comparisions to these two remotes (and the search function has been down). The components that I have are a Mitsubishi HDTV, Denon Receiver, Denon DVD player, Scientific Atlanta HD cable box, Pinoneer Laserdisc, and a Phillips CR-burner/player. I also have an Xbox hooked up to all this. Thanks for your help, opinions, etc.