Way to often, listeners are expecting the wrong performance from a sub. We mistakenly expect the sub to perform the tasks that should be performed by our mains. The detail, impact and timber we typically expect to hear in bass, is in frequencies above 40HZ. Frequencies below 60 HZ are non directional and do not contribute to the imaging character of the main speakers. There is nothing quick or detailed about deep bass; even at 40Hz, it takes over 25’ to complete one cycle. Since every room and the amount of space will effect the performance and requirement of equalization for any given sub, as others have mentioned, it’s very hard to evaluate, in a dealer’s show room, how a particular sub/subs will perform in your home.
Aside from budget, you’re room and willingness to do some experimenting with placement and settings should be the deciding factor, but any of the subs mentioned should do well at loading a medium sized room with enough clean bass energy to fill out the very bottom of your bass performance and that should be all you are trying to do with a sub.....Jim