Bernie - I've tried the BK7m using the lower manual of my Nord C1 (which is splittable with bass) as a controller. Like you, I just put the module close enough to use the local controls on the module. The problem with the E2 is the same as with the C1, no aftertouch. The same problem exists with my VP-770. This is not a huge problem but a few voices definitely benefit from aftertouch.

Dave - I have also used the VP-770 to control the BK7m, and except for the aftertouch problem mentioned above, it would be the perfect combination for the scenario you describe. It has the best harmonizer, vocoder, MP3/WAV player implementation (with the ability to play key-assignable parts of any mp3 or wav file IN SYNC and in a variety of ways ie. loop, once only, etc.) and combined with the BK7m, playback SMF's. It has some very good internal voices but can also use the RH voices of the BK7m (which are very good). A lot of people blow this instrument off but I honestly believe that if you were able to try it out for a long enough time to discover it's true potential, you might become a believer. It's an awesome instrument for a solo act that is vocal-oriented. The deficiencies of the VP-550 have definitely been overcome with the release of the VP-770. It comes with a great headset mic that virtually eliminates feedback. Truly a hidden jewel.

chas