For someone to try and tell me that one subwoofer (or any AV electronics product, for that matter) is superior to another, and to "just buy that one, cause it's better", doesn't equate! I'd first be asking myself, which product will work better, in my system, with my setup, in my room, and basically make a better fit for my application.
Equipment matching is all relative, system and setup dependent and, of course, dependent on personal preference and taste. But for a subwoofer, setup, room and acoustics, and system matching and integration are key.
For instance, I know that the old Servo 15, as a sealed unit, was superb for both movies and music, could perform well placed near the wall, and was fast, musical, and potent for home theater, without drawing attention to itself. Some other ported subwoofer that's competing would likely need to be addressed different, and may or may not be as effective in the same setup, room, or system.
So for me to say to anyone that one subwoofer is better than another, I'd have to first qualify a lot of variables before I recommended anything.
