fishy according to jls chart you should be right outside the danger zone eights arent the best of pounders but you dont seem to be the bass head type anyway from your music posts on another thread (hehe)
W7s are susceptible to their share of problems as well. Surrounds problems, cone failure due to design or manufacture, of course the occasional burnt voice coil b/c of misuse. These don't happen very often, but happen nonetheless, surround being the most common. They don't seem to have as many problems w/ voice coil misalignment as some others, but they also don't have as tight of a gap as other comparable subs, and are also a long gap, long voice coil design. I like the X.X.X. better than the Brahma as well. Stronger cone, more motor, more excursion, I actually like the SQ a little better.