Okay, updated, restarted and it failed to boot.

1. First error message was the sound issue, no worries, booted into safe mode and installed appleHDA.kext

2. Still doesn't boot. Looked at it again with -v and it looks like it hangs just after NVEnabler runs. Boot into single user mode, and remove NVEnabler 64.kext from S/L/E

3. System now boots to desktop, but only 1024x768 resolution. If I change GraphicsEnabler to yes in com.apple.boot.plist, system still hangs.

4. Tried man_of_the_oak's extra's and extensions...boot screen is correct 1366x768 but hangs at: "acpi_smc_platformplugin::registerlpcdriver-failed to locate smc driver"

No idea what to try now....any ideas?