I am getting the Alpine CDA-9885, the sub will be going in a 1998 Dodge RAM 1500 SLT, its a 4 door i geuss you could call it. But theres not very much room in the backseat so space is limited and i would like to be able to keep 2 seats open in the back. In your opinion what would be a perfect sub + amp for this. Im lookin to spend about 500 on the 2 but if it can be lower the better. Something that can get pretty loud and not be distorted lol