Half the nay-sayers of the G70 on this forum have barely PLAYED one. 20 minutes in a store through crappy speakers on an instrument the dealer hasn't bothered to upgrade to the latest OS and styles is hardly a fair comparison.
My own feeling is, were it not for the dated styles in the G70 (and you CAN get third-party and converted styles for it) the only thing it has got going against it is it's weight! (I kid.......!)
As a live keyboard in a band (what I use it for, mostly) I can tell you IT ROCKS!! Great piano, great B3, incredible action (better than Yamaha, no doubt), easy access to all the tone balancing/shaping tools and intuitive interface.
I can gig with it and not need to set up Performance setups in advance (can't do that with my K2500!). Just select tones on the fly and balance volumes and effect with the sliders. Easy.
Too many bedroom jockeys posting their opinions here as if they had any real experience. My advice is go play a G70 (make sure it's OS2) BEFORE you buy anything else. The action alone makes it a true professional instrument (can you play piano on 60 keys? I can't!).
Yamaha sounds real slick by itself, but put it in a band situation, and there's not enough 'cut' (for me, at least).
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An arranger is just a tool. What matters is what you build with it..!