Weighted keys would limit what you can do on an arranger AT LEAST as much as 76 semi-weighted do for piano playing. The thing is, what proportion of your playing WOULD be piano IF you had a fully weighted 88 arranger? And what proportion would be all the other sounds that benefit from lighter actions? You can't have both (without lugging two keyboards around), so logic would dictate that you use the keyboard that suits the majority of your choice in sounds, and simply get used to the other.

An 88 arranger player that played primarily piano would be at an equal disadvantage for all the sounds that benefit from the lighter touch, but would put up with it because he had the majority covered. I would LOVE a full weighted 88 for my piano and Rhodes parts, but would hate it for organ and much of what I DO use.

I believe that both of us have sufficient technique to use the wrong action for a piano sound IF it wasn't what we were primarily doing. Or use a heavy action for organ (but that would hurt!). It's all about playing the percentages if you are committed to the 'one keyboard' rig.

Just imagine, you use your regular PSR arranger for the gig, but say you get ONE request for a full piano number... with a 61, it's out of the question. With a 76, it's still doable, if not 'perfect'. Me, I'd rather have 'doable' than two 'perfect' keyboards that you ALWAYS have to set up 'just in case' (and I know you don't ALWAYS set up both )...