Well i have a 2001 Sierra 1500 2Dr, and i want good speakers for it because im getting 2 12inch audiobahn subwoofers for it, and i dont want the base to overpower the lyrics. So i was wondering if the boston acoustics z6s would be the best for my truck, will they fit because i saw the picture and they have a big magnet. Measurements for my truck, 6.5 inch in the front and 4x6 in the back. The only reason i ask this question is because im a noob and it says 6.5 inch round on ebay. So can any1 comment and make any suggestions. thx payce. also i would like to know what would be the best 4x6s for my truck.