I bought a PB12 NSD/2 based on my emails w/ SVS between the Plus and Dual: "I’d probably pick the Plus for size and depth and overall balance, but the NSD/2 is THE choice if you aren’t looking for n’th degree depth and just want the best bang for the buck for any single sub (size be damned) under $1,000 to the door."
Be known that the dual is enormus