Oh and I'll post up my wiring diagram/pictures of the setup too. I'm not ruling out some dumb mistake in my wiring that's damaged something.
I'd still like to test another PC but it might take a while to pick one up. I grabbed a couple off a friend but one wouldn't boot with the 5i25 installed and the other didn't have a PCI slot, just PCIe. Duh. PCI slots are starting to phase out it seems.