Don,
Last night I was fiddling with the velocity curve on my PA4x, and I thought of you. I'm sure you tried all the settings, but maybe one of the curves will "feel" lighter to your fingers, since the response will be quicker? Just a thought ... and that whole 76 key long-bed is the major reason I passed on the Big G. It doesn't even matter how good it may sound, if I never want to take it out to play. Good luck - it's a tough decision.