I have two RE SEX12d4's. I am runnig them from at 1000watts at 1ohm. I have the option of getting a DD Audio 1510. What setup do you think would be better sounding and still loud? I would be running the DD at 1000w. I dont know what size box tuned to what for a car used daily! Any tips, links, ideas and most of all good (simple) description will be much appreciated!