I'd consider FW3A a better deal. Though I went with D4 and I love it.
Its not available to buy yet though, in fact it wont even be this year and on top of that, not owning i cant say if it is or not. I am on the list for one, however i am not a fan of the xp-g3 or at least the ones i have. But for $30(sometime next year) it may be the best value light (subjective anyway).