Technology and new space-age materials will make arranger keyboards considerably lighter in the ensuing years--it's inevitable. One day in the not too distant future, you'll see arranger keyboards with massive onboard memories, huge displays that can be seen in direct sunlight, and weigh under 20 pounds. The physical weight of an arranger keyboard has never equated to quality--NEVER!

As for hefting 40 or more pounds, a decade ago it wasn't a problem. Now, at age 70, that 40 to 50 pounds seems a lot heavier. And, as Scott stated above, the bulk is something to consider as well. When you are lifting a bulky item it's fairly easy to become a bit off balance and damage your hands, back, neck, etc.. because you would not dare drop that expensive piece of gear. I can vividly remember hefting 105-pound Peavey speakers from the back of my van and carefully lowering them onto a refrigerator dolly, then push them up a ramp and lift them up on a stage. Thanks to modern technology, those days are gone forever. And, as stated above, technology will soon make those 50-pound arrangers, dinosaurs.

Happy New Year from an old guy that is still kicking around--just not as high as I used to.

Gary