I have been looking for a subwoofer for the past month and after auditioning psb5i, polk audio 110, energy and boston, I'm leaning more towards the energy as I found that it goes deeper (21hz) and I use my system for movies mainly. I'm currently using the saw3000 sony and I think I've just outgrown that boominess.I'm using this with wharfedale diamond9 package and sony 1200es (which I'm upgrading in a month to yamaha rxv671 for the hd codecs). Pls help me decide between the boston and energy. Thanks guys.