if i was gonna use this car as a daily driver where trunk space and rear seats are still necessary, id probably go for 2 18" Fi BTL's and an Fi amp to power them, and some rockford fosgate 6.5 inch component speakers for the front and some good rockford 6x9s in the back deck. I'd have one amp powered all 4 small speakers probably at about 150 watts RMS...all this with the BIG 3 upgrade and using 1/0 gauge wiring and maybe some nice neons that bumb the the bass