help building a competition system

it has been a while since i was in a comp like 04 and it was a small show i came in second so not to bad but know i have a 2002 gmc envoy and i am putting the pioneer 5000dvd head unit in and the kicker componet system in the front it is ss65.2 and in the rear door i am putting the ssmb6 and i am going to run the kicker zx6504 on them i want to do 3 8's in the back but don't know which ones i was thinking of a sub called t3 but i am not sure and of course not sure what amp if someone know a better set up please let me know through here or email jcooksey_06@yahoo.com thanks