I have a 2001 s10 ext cab. I don't know what to choose. 4 sa-10's, 4 sa-12's or 3 sa-15's? The subs will get 3000w rms @ 1ohm daily and 4000w rms @ .5ohm burps. I am going for overall loudness on music and some spl. The box will be made by Dave the box guy so that's not a problem. What do you...