If you want the best and the loudest I would go with wetsounds. I have the pair of 485's with the syn 4 amp powering them. That is what Omar with wetsound's told me to roll with. Here are some pics of what they would look like on a supra
http://www.wetsounds.com/pages/galle...pra/supra.html
http://www.youtube.com/watch?v=y9rgO...eature=related
And there is the proof right there. Good luck!