i just bought a nesa dvd touchscreen radio and now i am entering a feild that i normally wont deal with but would like to throw some small sounds setup in my car nothing serious but decent so my idea was to mount up some free air subs mounted behind the seats and some 6x9 in place of the stock 4x6 and some better dash speakers so let me what a decent setup that wont break the bank also would need a amp to power it all up