I want to add new speakers/amp to my sound system in the car. I am thinking these speakers: http://www.sounddomain.com/sku/PIOTSA1680R with this amp: http://www.sounddomain.com/sku/COU481QE What I have already in the car is this: This amp: http://www.sounddomain.com/sku/COU401SE This deck: http://www.sounddomain.com/shop/item.pl?sku=PANCQDF903U&vq_id=-25 For the subs, I don't have a link. But they run 250 RMS 500 Peak with 4 Ohms impedance so I am actually underpowering them quite a bit. I don't think that is an area I need to upgrade. At least not for a long while. Any comments, I am wasting my money? My argument for getting an amp is for 60 watts rms rather than the 25 rms that would be coming from my deck.