if you decide to go with 8s, cross out the dc 8
the dd1508 was louder than the sa8 when ric at pulse car audio did a test but not by much...
the sa-8 was very close in spl but sounded better and was the better value!
also, if you dont mind a sealed box, you can do 3 sa-10s in the 2 cuft before displacement you say you have..if you can squeeze four net sealed you can do 4 sa-10s