Hi, I am debating buying one of the above. My system is 2.1 at this point and will be mostly used for music, (but of course with movies too) and none of the rooms it will be used in will be massive. I have a penchant for deep bass and play a huge range of music, from classical to pop, rock and lots of rap and d'n'b too, which has loud, low, sustained bass notes. How do these two sub options differ in performance? I know the PC ultras will go lower, but will the PB12 be low enough? Does either have more port noise than the other? The tubes are more managable to move about, but need to be co-located to deliver their best performance which negates their lower profile. The box is big and weighs a ton, but its cheaper... thanks for any advice!