Hmm ... still stuff going on at 30Hz. For me that's kind of good enough.
Dr. Carter's ported alignment for the JL would probably be perfect if it wasn't for the cost and all the work. The Bash 500 amps have some sort of PEQ going on too. It always comes down to time and money. The real problem with that JL build would be the port. It adds so much displacement that now you're back into a big box ... not to mention build complexity.
Anyway I meant to ask what the Vb was for those two sealed subs you modeled. Can that 10" actually handle 500 watts? Edit: Looked it up and it'll take 250 watts. Hmmm.