money can be a problem.
getting the subwoofer and amp is only have of the system. upgrading ur electrical in ur car is also important.
if ur wanting loud i would look at the new BTL at ficaraudio.com if u could get a pair of those with an amp from audioque.com
the aq amps are really nice and put out the true rms it says if not more. and for the money u can't beat it! the audioque HDC3 subwoofer is also great. the BTL will get better sound quality when the HDC3 is built for just being loud. the BTL is for being loud and still sounding good,
anything over 1000 watts u will need either more batteries and/or bigger alternator. the best for a battery would be a brand called northstar. what they make is not for car audio but does better than any stinger or kinetik battery hands down.
be sure to get GOOD wire. don't go cheap on ebay. look at the knukonceptz wire that say 100% tinned copper.
getting a box is VERY important. if u have the tools i would say make ur own . a pre made box is not good because it is not set up for the subwoofer u have, its just a general box. email the places u get the subwoofers from for information about what kind of box the subs would be best for
