Just a few questions/comments
Apart from sleeping, you probably cant restart or shutdown.
Do you have all cores enabled?
Do you have good temps?
Why would you boot in 64b (I doubt you have >32GB of RAM) and doesn't PCEFI 10.6 boot in 64b by default?
Whats the point of NVEnabler and GraphicsEnabler=Yes?
I'm pretty sure we don't need JMicronSATA, since the JMicron chip powers the back eSATA port and maybe something else... I think all the SATA ports are ICH10R. We do have a VIA ATA/Firewire chip thou. This last thing isn't well documented, so I may be wrong.