what would you guys suggest. I have jl xr components in the front and jl vr6x9's in the back. I'm tryin to decide weither i should buy the jl 300/4 which would supply all four of my speakers..or forget the rear fill and just buy the 300/2 to give my fronts more power. I guess my main question would be do i need more then 75 rms to the fronts to get them singing or is it enough? thanks for reading.