That's a never-ending argument with each manufacturer having their die-hard fans who would never buy anything else (example: me and Kenwood eXcelon - I suggested the XXV-01D as it is what I run and it is sh-weet //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif)People have mixed reviews, but whats the best out of the 3? Pioneer, Alpine of Kenwood. Simply just good sound.