Shadow Hawk, I to also work with a DJ from time to time. I use the RM1X because I can tap tempo mute and un-mute tracks in the fly etc. You can and will be able to mute tracks within patterns on the DJX but if you can spend a little more by the RM1X, you'll need a controller if you don;t want to use the little keyboard but you'll be much better off sonically and creatively with the RM1X.

Just a thought!!!