Honestly I am on the fence.
1. One 15" big boy
...or now leaning towards
2. Two small enclosures (2 cu ft max each) with the best 12"-15" drivers I can use ( I still need 20Hz response for movies)
What about the 2 small enclosure route?
Max of 2 cu ft per box.
Still need a low -3dB point though.
I am really interested in going this route if doable as it would allow me to not alter my current setup at all up front.