Well I am upgrading my whole system and I bought everything except for the subs. I got the pioneer mp8600 HU, hifonics brutus 1500 for subs, hifonics zx4000 for the highs, and infinity 5x7's all around. As for the subs, I have no idea what I want to get. I have a 450$ cap for the subs so I have to stay under that. I was looking into the 15" si magnum d2's and they are sold out til middle of june and I do not want to wait that long. Does anyone have any other suggestions on what I can get? I want something loud but yet pretty clean. I would either go 2 12's or 1 15 as long as it is in my price range. Thanks guys