I have the DS-10. Wonderful little toy, I've been having a lot of fun with it.
But I doubt you could use it for remixes, unless you recorded the sounds to your computer/ mp3 recorder/ mini-disc/ whatever the heck you use for recording and uploading, and added it to the track later.
But that's my thoughts.
I will say, the kaossicilator pads are a joy to play with. =D