Mike you do know my G1000 is long gone?

Oh that's right. I've been out of the loop for quite a while here at the Synthzone and I now recall you did sell it a while back Fran.
The G70 is a very decent arranger although it's getting a little long in the tooth. I really think the BK-9 sounds a lot better than the G70 although what we've heard so far of the BK-9 is just the internet demos and they can sometimes be deceiving.
Again, the goal is perfecting sound realism so that keyboards sound identical (or as close as possible) to the real deal. People enjoy the sound of a Stradivarius more so than they would enjoy the sound of a generic violin. When sounds don't accurately represent real instruments people have a tendency to question their authenticity. What is that you're playing?? A guitar? You could have fooled me!
A trumpet sound needs to sound like a real trumpet in order for people to distinguish what instrument you are attempting to play. Low end arrangers (and many mid-range arrangers) miss the mark in many cases and people are smart enough to recognize a real sounding instrument from a vague representation. I want people to hear the best possible representation of any given instrument sound because it enhances the whole experience and the audience in my opinion is more appreciative of an excellent sounding performance than they are of a mediocre experience where the sounds don't accurately represent the real deal.
I admit even high-end keyboards still have quite a ways to go in many cases to capture exact representation of real instruments. But they are advancing in sound quality and in sound realism and that's encouraging.
The G70 is fine for Senior centers and other venues. You won't see a G70 in a professional setting though. By that I mean at a big name concert venue or on TV for that matter. Hopefully the stigma attached to arrangers will disappear soon and in the near future we may indeed see professional quality high-end arrangers in professional settings being played by big name bands. I'm really looking forward to that day.
All the best, Mike