I don't think the rarity of a SF4 with Dimarzios would be a big deal to many. Just look at the price of used Dimarzios on Ebay compared to the price of HB1s (when you can find them).
One of the things I like about HB1 outfitted guitars, beyond their tone, is how easy it is to swap in & out other pickups. With the HB1 lugs it is a breeze. I have been thinking about selling my SF4D and figured I'd keep the reissue SF5 foe exactly that reason. I have already installed vintage HB1 in lieu of the late model HB1's and it would be easy to install XR7s and the Dimarizio's. One of these days I guess.