BB/Mag is a great resource, but you gotta be careful. DefTech has a reputation for fudging their numbers a bit. Personally, I didn't like the sound... thought the Bipole design sounded scattered compared to your standard towers. Also, that "built-in-sub" was a litle problematic.
To me.
First and foremost, if you like the sound... well, its your money. We have DefTech fans here, we have SVS fans, all kinds.
How big is your room now? Just curious. Are you on a one year plan to relocate, or a 5-10yr plan?