There has been very little offered from Roland in many years worth getting excited about!
The BK series Arranger keyboards are just one more example of a non-event from Roland.
The Jupiter 80/50 has some pretty good pad, orchestral and synth sounds.
Probably a good consideration as an added solo keyboard along with the Audya.
I think for the most part, Roland just hasn't kept up in the Arranger Department.
Nothing exciting I could find about the BK!
As always, just my personal opinion.
Jim