Alot of people on this board have the disposable income and are giving you the best suggestions that can(meaning best audio, ect).
Im currently determining a budget audio upgrade since there are other things id like to spend my $$ on.
If you think a powered bazooka tube would suit your needs, then by all means dont let us stop you. Big is right, it will not be very clean, but it will still have bass. just muttled.
Rhinetom looks like he has a nice easy setup.
do you have stock speakers? base or bose?