Right know i have the alpine m350 amp running off my factory radio. i know its not the best setup but, its all the money i have for right now. Im lookin for new subs and wanted to know whats best. Im lookin for something louder, than what i hav because, since i have a factory radio i cant turn the subs up. Im lookin for something around the 150 to 250 price range. I was told to buy duals but i know they arent that great. I was just wondering if those were the best in that price range or if there was something better.