just wondering.....im getting a 1986 nissan exa coupe/sedan and planning a huge spl sound system. my choices are 4 jl audio 10s, 2 jl audio 12s or 2 jl audio 15s. as i have a clarion 4x150watt rms amp, bridged to 2x300watt rms, which setup of subs would be the best for loud spl (box built to...