Sooo... I was thinking about getting a Nightshade 12, but I see that they are sold out of the dual 2 models.  My next choice after that is a DP 12.  First off, would 1500W be enough for this sub on a daily basis?  I have a US Amps Merlin MD2.D, and I'm not looking to compete or anything, just enough power to get the most out of the sub as a daily driver. Second, are there T/S params available for the DP?  One of the things I like about the Nightshade is that it works well in small (1.5 cuft) boxes.  Would this be too small for a DP, or would I need more like 2-3 cubes?  I am looking for something with decent low-end extension down to 30 Hz, and not too peaky or boomy. The other sub I'm considering is the Audioque HDC, so if anybody has any comments about how the 2 subs compare that would be appreciated as well.  Thanks!