Hey, Im looking to purchase a single DD 3512 or 3515...I was wondering if any one could give me any personal experience info on this series. I know you cant really go wrong with DD but what you would recommend? 12's or the 15? On the site its only a $20 dif so im not worried. Also recommendations on amps to make either one pound hard would be great. Im mostly looking for SPL but still want the SQ. Any help would be greatly appreciated. I was thinking a Memphis 1000D or 1500D any input? -Mike