Thru research, I know I can find these subs cheaper online. However, I would like to use CAR TUNES in Michigan to get the subs simply because they will replace the subwoofer forever, or as long as they're in business, if I blow it. Is this worth the extra money? I've seen the sub go for about $200 even from respectable online sites.
make sure you get a written copy of their policy and make sure that it realy is covered that well... often times sales people will say things that are right on the border of the truth...
Of course, as long as you listen to music with your levels set correctly, there's no reason you should blow the sub. If you seek more output, look into a different driver. $240 for the W3 (I pray to God it's then newer "W3v2" model...and even so ) is awfully expensive!