Upgraded to JNCIS!
Used a free voucher from my SRX bootcamp they brought in at work and got my JNCIS-ENT today! I'm still surprised how elementary the test system is compared to Cisco's. I was expecting simlets and drag and drops and the whole shebang... Either way, going in at a CCNP level, it was a pretty decent exam. Onward to JNCIP!
Reading: Internetworking with TCP/IP: Principles, Protocols, and Architecture (D. Comer)