The shipping case for the G70 was oversized, for protection purposes. But put one in a fitted flight case, and it isn't much of a problem. We all move speakers around more heavy (or at least, most of us do), so weight is NOT the issue. Which only leaves learning to move around the SIZE of the thing. A dolly, underneath the case, and learning sensible leverage techniques, a handle at both ends (as well as in the middle), and I can assure you, I almost NEVER, even when I AM moving solo, have to pick up the entire weight of the case and keyboard. Roll it up to the car, put one end in, lift the other (half weight)... Don't you guys DO this?
I would bet that most of us pick up our speakers' full weight far more often than the entire weight of our keyboards. And, if THAT don't give us a hernia, why is the keyboard any different..? It's a bloody sight more integral to our sound and performance than one type of speaker over another. Yet we place FAR more importance on shaving weight off them, and accept often a very inferior product, to shave a mere four to six pounds off of something we hardly ever carry...
Why are speakers more important than your main keyboard?