I have a P2D CE too and would not do it. First because the difference in output is not that high. Second because once you have bought the Rebel 100 version there will be the new CREE Q5 type on the market and should you buy also that one you will be faced with an R2, R3, R4..... immediately afterwards.
My advice is to enjoy your new P2D CE and wait a while before you look for a new one. By that time five or six improved versions will have been marketed and the difference in performance will have become significant. Only then you will be able to enjoy your next purchase much more.
If you change your light now you will probably join the list of people who post new issues starting with "Disappointed by the new.....". :naughty: