Gotta think about this one.... If you have a P250, why was the weight of a G70 too much? But OK, I get it...

If you are used to 88's, a 61 is a hell of an adjustment, maybe the E60 might work for you... a LOT lighter, similar OS. MUCH better keybed than any PSR.

Alternatively, Donny is still struggling with his Ketron, perhaps that might work for you (roughly 8 lbs. lighter than G70), good live sound... Make him an offer.

If you have the money for a G70 and can handle a 61, there's always the T2... Opinions vary about the PA800, but most T2 owners seem happy. HUGE style library for that one...

I think I'd say E60 for a 76, PA800 if you can't afford a T2.

Best of luck...