OUR12....Well, the boxes you're talking about would be OK but I don't know as you'll necessarily get more benefit from the greater number of knobs/sliders as you would from a well-equipped keyboard controller. Don't know that much about the Access or Phatboy but you'd only really gain if you could assign them to send pressure,etc. If the 1000 is like my 6R you only have 3 levers and 2 pedals whichever controller you use. The modulation power is in the Matrix itself. Other possibilities include E-mu's Launch Pad (for extra nonkey things) and Oberheim's own XK controller which was made for the Matrix models (both discontinued so you'd need to hunt).mn