I have a 115 ported double baffle B-15 Fliptops cab. Fliptops won't wow you with they're stellar workmanship like Vintage Blue does with the double baffle cabs they make, but they make nice cabs in pretty much all varieties of vintage Ampeg whereas
VB only makes early B-15 replicas. Me, personally, I have to have at least two drivers to be totally satisfied on a gig, and almost always use two cabs with my B-15, and if I were to go with a 115 it would be a fEarful or something similar.
But you didn't ask that

Anyway, if it were me, I'd go ported 115.