[mikegett]

Brands don't realy matter. Try to avoid underpowering the woofer. The lower you can keep the gain of your amp the better performance you will get. Try to remember that heat is the number one enemy for woofers and amps. Distortion introduced into a woofer will creat heat and damage the cone. The same applies to the amp. If you have to max out the gain, run the amp at its lowest ohms, or drive it over the RMS rating for a extended period of time the performance will suffer. If you are expecting to drive over 1000 watts continuously then look for a class D amp. Try to remember that a sponsored vehicle will change equipment multiple times throughout the year. In many cases longevity is not a concern.
Here is a tip about spl woofers. If you truly want to compete then try to avoid placing all of your money on a 3000 watt woofer. It is more about the size of the cone and the lengh of the excursion. Find out how many 12's will fit into your car. Then go for the longest excursion you can afford. It is more about volume of air and not wattage. The alpine type x 12 inch woofer has a one way excursion peak of 3/4 of a inch. The eclipse sw712 aluminum cone has a one way max of 1.4 inches. The alpine retails for 550 dollars while the eclipse retails for around 240. Look around and you might find something better for your needs.