Besides the tracks, it seems that the 1680's software updates seem to be better. It had a virtual mastering room which is pretty cool, and a few other things here and there, but I think it is mostly the extra tracks. If you think you will need them, and you got the $, the 1680 won't dissappoint you. IF you can stick to around 8, then the 880 will work. You can always get an 880 now, and if you outgrow it get a 1680 and synch them together....lots of power!