The MOTU828 has been a great solution for me so far...I have successfully used CV Tools with it and just recently found another cool use where I take audio out from Ableton into my Hydrasynth desktop as a ring modulation source...granted I have just played around with that and not really composed anything with it, but it is cool to run some crazy Serum sound out into my Hydrasynth and ring modulate with some of the crazy waves available. My Hydrasynth audio then runs out into my modular where I can do other stuff with it...FX Aid XL has been fun to use with it too :)

JB