Whats your budget these guys can you find the best one for you. Sundown amps are good but if your in a budget the AQ1200 would be good for you. http://www.audioque.com/aq/?page_id=26 for $229
I dont have experience with these but i heard there good. Im going to try one out myself. IM going to get the MBQuart discus 2000d They make a 1000d too. for like 163 shipped on ebay. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&Item=350296132402&Category=18795&_ trkparms=algo%3DLVI%26its%3DI%26otn%3D1 Of people who have ran them say they do rated at 12v.