It is always a pain to have a peripheral piece of equipment. I like the digitech VL3D. The advantage is if you change keyboards, you still retain the same vocalizer you're familiar with. For me, I would choose a Yamaha prs750 and use the outboard vocalizer. Together they are less expensive than the 950, and you're not stuck with one (vocalizer) you don't like. Also, if you play more than one instrument during a performance ,the vocal effects are available for both.