I think I've decided to wait (ouch!) until someplace that was out of them gets them back in stock. That way I can be (more or less) assured it's new stock of revised boards. (Plus I'll ask them before placing the order.) I am leaning toward getting it from Protovapor, if they get new stock about the same time as others -- based on the feedback on this board, they seem to be doing some real quality control.
Actually, I am sorely tempted to get an XPV 40 too. Problem is, I'm afraid I'd find it pretty clunky to hold (5'6", medium small hands). Once a setup gets above a certain size, I seem to much prefer both the look and feel of a box mod style, plus I think they fit in my pocket better -- ergo why I was initially leaning toward the rDNA. (Feedback on others' experience with the kinesthetics of the XPV welcomed. Please include glove size.

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Maybe I should print out an XPV-sized box, tape some weight in it, and see how it feels and fits in my pocket.
Oh wait, I don't have a 3d printer yet. Rats. Too many projects, too little time.