I have the same HU!!!!
Congrats on getting the JL 12W6. Those speakers rock. Your speaker will be fine with that amp, although it will probably want more power. I think the W6 series can be run around 300 watts.
JL makes all their speakers 6OHMs. You can get dual voice coil models which would drop the load on your amp to 3OHMs if you really want.
What's the power rating on your amp? Is it 100x1 into 4OHMs? Is it a two channel which is bridgeable?
Karl