Re: Transient response
I'm well aware of transient response, but I think there are other factors at play. If the rocket sub reached as deep as the Hsu/SVS subs, then we could compare, but I still think some of the "tightness" people are hearing is due to a lack of deep bass. Boominess in a sub can be accentuated by resonances that weren't there when produced by a less extended sub.
But my point is, the Hsu and SVS should be capable of tight sounding bass, because they are both capable of flat, accurate bass as long as they are properly set up.
For the original poster, I don't think you will go wrong with ANY of your choices for music. I just bought a Mirage with 12" drivers with dual ports, and it sounds better voiced than my old boomy Paradigm sub. The careful setup I did made all the difference too. I just get utterly clean bass at normal listening levels, nothing added except lots of impact when the source material calls for it.