Now Nichlos, if you were hanging out with us Klipscheads over at the Klipsch Forums where you belong -- you would have known about the new speakers long before you bought your RF-3s.
I wouldn't worry about -- I'm not convinced the new cones are so much an improvement as much as an attempt to shore up the density somewhat because of the older cones were so prone to being dented. I think the older cones might be lighter/thinner -- and react to transients better. I could be wrong -- but that's my gut feeling.
Enjoy your RF-3 II's -- they are great speakers.