Hi Scott,
A friend of mine just purchased a Yamaha DGX520, which is the Canadian equivalent of the YPG525. He plays accompaniment for Cape Breton fiddlers and needed the full 88 keys.
He tells me the 32 note poly isn't an issue for his type of playing. and, like you he has carpel tunnel issues...he just loves the action.
I would find 32 poly a bit restrictive because I like to layer sounds(Piano/Strings...Piano/E.Piano) and I'm sure it wouldn't be enough for me. ..64 notes would be my bare minimum.
The other thing, Scott, is that these pianos do not have dedicated MIDI ports like the NP30...maybe that would matter to you?
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.