Well that's interesting. Has anyone got a pic of the JE piston lying around?
Do they have short skirts?
I went for the wiseco's recently for the abovementioned reasons basically. Teflon coated skirts from factory, clearances are smaller than some, fairly quiet compared to some, nice long skirts for keeping square in the bore, not expensive.
This weight saving says to me you have even less reason to get a new crank.
Just my opinion.