Boston Acoustics Vs Fi?

Hey guys, So I have been updating my system, Currently I am running a 10" Boston Acoustics G5. The sub is pretty amazing although I want a 12" to hit lower notes. I know my G5 hits the lows but not that loud and you cant really feel em like most 12"s. I was thinking about getting a 12" g5 but everyone around here has boston acoustics. Then I found out FI Audio. I was looking at their Q series...how do you guys think this would compare to a boston acoustics g5? I know the Q series is mainly Fi's sq subwoofer but thts okay thts what i am going for..