hey magma! I dont know *that* much. Just spent some time after car audio, thats all.
a bass tube will do - it will be loud enough, and fit your budget, but if you like tight bass, you'll outgrow it soon enough. On the other hand, if you like hip hop etc, you'll love it !
I'd say buy it if you do not plan to upgrade your setup any time in the near future. else hold out for an upgrade sometime later