I'm not sure if you mentioned trying the BK-9, Cassp...several here are very fond of it, and I'm sure one or two were (and perhaps still are) G-70 users.
The real issue with the G-70 is the weight and subsequent difficulty in moving it...the BK-9 certainly sounds the business, and still offers the 76 keys as on the G-70 (plus I believe it will play the latter's styles) but it is far lighter.
Just wondering.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.