"BK9 BLOWS AWAY THE 750/950 as well as the 900". . .

I think that depends on your needs. If you need built in vocal processing and harmonizer, that lets out out the BK9. It also seems to have a lot of menu layers to get through--not conducive to fast on-the-fly live play.
I do like the Roland sound though. Can't comment too much on the BK9 because I haven't auditioned one, but I loved the BK7m and would expect the 9 to be as good or better.
There are also some other differences between 750 and 950. The screen, new sounds, memory, drum kits, and again the vocal processing.
BK9 does seem to offer a lot for the money though, especially if you need 76 keys! No other arranger options short of Korg PA3X-76 or Ketron Audya.
DonM
_________________________
DonM