That's me. Maybe it is time to change my user name on here too. Yes, the guys are correct, the larger enclosures are a little more efficient. This is mostly due to less air spring on the cone of the driver (kind of think of it like back pressure on an engine from an exhaust) so less power is needed to reach similar output. With that said, less of it from a larger enclosure, means that it is harder for the motor to control the cone, which will make the chances of damage to the driver under heavy usage, a little higher. Usually my preference is less power, more enclosure. But because you are going more power, go with something close to the smaller suggested enclosure. In my findings, with the Dcon, the difference in sound between the two enclosure designs is almost impossible to hear. There may be a slightly stronger peak in the smaller enclosure, but that can be effected by a number of other things. Hope that helps.