Certainly not a new install, but there's much IB interest in these parts so I figured I'd post mine. Quite modest as IB's go, it's a pair of Ascendant Atlas 15's (discontinued) in a 128ft^3 closet (~5x Vas). The coils are wired for a Qts of 0.57, if I recall correctly, but can be varied from .4 to .8.
Sound is, well, like clean bass
and SPL is certainly adequate in my 1400^3 room.