You can get way better than that JL. Spend $70 more and you can get two skar vvx 12s + custom box built to your specs that would completely shit all over that jl sub, hell even 1 of them would destory that JL. And just cause the enclosure is built for your sub doesn't mean it's going to perform well in your car. All cars have different acoustics, so what sounds good in 1 vehicle may not sound good in the next.
You have a huge budget, and many options, but why do you wanna stick with that jl? Just cause it comes in a box already?
The sub is a SVC 4 ohm. He can't wire it to 2 ohms...unless you are talking about a sub you listed.