Then you don't need EnsoniqAudioPCI. That's only loaded if sound.virtualdev = "es1371".
On another subject - Fusion 5.0.3 - The darwin.iso in there is byte-for-byte identical to darwin.iso from Fusion 5.0.2, so there's no need to reinstall it.
So if everything is set correctly in the vmx file where else can I look to troubleshoot? AppleHDA not loading for some reason?
Also the darwin.iso I have is 5.0.0 so will there be any benefit trying 5.0.3?
Edit to add i've gone back to 10.8.1 via a snapshot and everything is working fine. I'll stay on this for now unless there is an easy fix for the audio issue i'm experiencing on 10.8.3