I went to a car audio pplace looking to get a system installed. I am getting 2 12 alpine type R 600w. I think the model number is swr-1223d in a probox and a kenwood kac-9015d amp. The max power on th amp is 1800w. They ar going to do that systm plus wires and istallation for $750. Is this a fair price. The store is kind of shary with prices cause at first he told me 1000. Any idea wat this is worh so I can make them an offer or somthing.