Power Supply came in, computer booted just fine so the damage was restricted to the OG PSU and the hard drive that melted. I was even able to get the two other hard drives that were 'torched' to spin back up. I got the data off but I'm not sure If i would trust them at this point since obviously they get pretty hot.
The torched hard drive is a loss. Swapping the PCB didn't seem like it was viable as the chip that held the configuration data that you also need to swap was pretty melted. The data on it was all replaceable so it's not the end of the world.
Thumbs up to EVGA's "midweek madness" sale.. they apparently dump a bunch of stuff (mainly video cards and PSUs) out cheap every wednesday. I got a nice modular 750w PSU with 9x SATA connectors for $50 shipped.