Go for the hertz The JL are harsh and over price compared to the performance that they can do.
Man i didn't think of sub zero temperature can damage your speakers . Luckily i live down south.
+1 on S4 .. Great amp. I heard it in person and all i can say is WOW . The 200w channel is really pushing the midbass to the limmit. Loud clean its perfect for power hungry active set up ( average budget)