Can't say I agree with you, abacus. Having both (or at least the BK-7m for now), the basic meat of the rhythm section is far better in the BK's, the basses are far meatier, the guitars are better...

I think most of this, you are responding to what is being played, not what it is being played ON.

Not to mention, when the G70 came out, it was head and shoulders above Roland's previous arrangers (particularly if you had skipped on the V/VA series and thought primarily in terms of the G1000), whereas this BK-9 is simply a beefed up BK-5, which you have already heard.

I definitely find the styles to have been balanced better than the G/E series, and can discern little audio quality difference between the two. And that's from having a BK-7m resting on top of my home G70, run through the same Mackie HR824 studio reference monitors.

It's amazing how the material can sometimes color one's attitude towards gear!
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An arranger is just a tool. What matters is what you build with it..!