Hi i am looking to buy a daw controller , i have been looking at the mcu pro and nearly bought one but found a deal where i could buy the older model and an extender unit for it for less than what i would pay for 1 mcu pro unit. I know the differences are one is usb and can chain the other units off it via the midi on the back of the mcu but does anyone know if the new model is that much better and worth forking out double on ??