Like many have already stated, I'd start off doing the Big 3, then go from there. Those Optimas aren't cheap...
Ya as long as you don't run both your lights and subs at the same time, you should be good with big 3
box and subs are ordered. tomorrow i will order everything else. also picked up some poly-fil at wally world. hopefully ill have everything by next week to install it all
and now subs/box/wires/bass knob are ordered. making a call to see if the amp has a remote bass knob hook up