The thing is, Scott, the organ and the piano are two different beasts, and the touch for one is not the touch for the other. Primarily, it is getting sufficient resistance and mass in the key for good dynamics control, something that is a complete waste on an organ!

So actually TRYING to find a 76 or 88 with an organ-like touch is going to work against your learning control, not help. You don't necessarily have to go to a full 88 wood, but I would certainly look for something heavier than the NP-30!

I agree with Ian that it is difficult to achieve really good dynamics control on a plastic keyboard, compared to a REAL wooden 88, but I don't feel it can't be done. But you DO need a keyboard with a lot more resistance than the NP-30 (or a PSR!), unless your technique is already well developed. One of the reasons I have stuck with the G800/1000/70 action I've had for 15 years, now. The perfect blend of light enough for organ work, heavy enough for piano!

Polyphony IS a factor... especially if, as most newbie pianists do, you use the sustain pedal a little liberally..! P70/80 are good actions, but you are back to heavy wood again. YPG's might be good (they definitely feel better than the budget NP-30), but are kind of big. You want to gig with this or stay at home?