I have a Sony 600 dvd and I love it. It will play both cd's and dvd's no matter if you have both in the player. I have it hooked up to my Yamaha digital reciever and it works great. Also "duke" mentioned uncles where he got the MkII at for 179. Wondering if they have a website because I really need to get one. I have seven remotes sitting on coffee table and would like to minimize it to just one. I would also like to say thanks for this site it has helped me decide which one I need to get. Thanks`