While the G70 was a great arranger in its day, I think that the BK9 surpassed it in many ways, and came in well under $1000 less. Yes, I miss the amazing action, and I miss the touchscreen, and I miss the main Grand Piano sound (the E80 and BK9 have a sound called Classic Piano based on SOME of the same samples, but they aren’t as rich and the default programming has them filtered down duller and less dynamic). I miss having 3 UPR & 2LWR & MBS, but the vastly larger User Set or Registrations (UPS) which went from 128 entries to 999 (!) made it easy to set up multiple Performances per song to circumvent that limitation.

But the return of the Chord Sequencer (missing since the G1000) alone was transformative for the arranger. The audio playback, both backing tracks and Live Loops, made it a modern do everything one man band keyboard (most pro arranger players I know use a lot of audio backing nowadays). And dropping the weight from 45lbs to 20lbs made it a lot gig friendlier. The soundset was completely E80 compatible, and the ROM includes a LOT of SRX card sounds, so having no expansion isn’t a dealbreaker…

They fixed the B3 sim to be MUCH better (it now can grind out Deep Purple without swamping the arranger parts!) and the synth sound selection is the best I’ve ever heard on an arranger (which you’d expect from Roland!).

I still have my G70, but must confess, haven’t switched it on for a couple of years. The BK9 is simply THAT good ❤️🎹
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An arranger is just a tool. What matters is what you build with it..!