It's usually recommended when provisioning that you only keep the NIC needed to perform the provisioning online, ensuring that all other nics are offline. In addition to the problem you observed here, there are known issues when provisioning ESX with mutliple NICs connected as well. Not ideal, but I hope it helps.
I can confirm that disabling the second NIC at the PCI level in the BIOS allowed me to get past the hangup noted in my first post. Thank you for the insight.