Ok, i hope this does not sound crazy, or start a wild debate, but i cleaned the laser pickup in my Denon DCD-1500 . I SWEAR it improved sound quality, mostly the high end....sound nuts?? I will do this more often and on my other players from now on. The Denon was skipping randomly on all cds...sometimes more than others, and was becoming more sensitive to floor vibrations, i popped the top, cleaned everything up real good, and all seems well. I can now literally jump up and down next to my audio rack and very rarely cause a stir. I was ready to pull it out of rotation! Simple maintenence fixed 'er right up! Does anybody else do this?