i have sr6500's and just bought a arc 4050xxk. i just got a super deal on a used jl audio 300/4. i dont know if i should use the arc or the jl amp. how is the sound quality on jl amps. they are supposed be pretty solid amps. let me know if anyone uses jl amps. i have got to just say no on these amps, its getting crazy. also, doesnt the arc amp use bipolar transisters and the jl mosfets and is there a big difference in sound?