Hello,
I see your configuration is quite similar to mine.
I am running a 2 years old lovely stable 10.4.8.
At this point I need to change to leopard.
I have been reading several forums last months and I selected finally this
iPC 10.5.6 to upgrade my system.

I am having some problems to boot for the first time.

My question is do you recommend ipc or Leo4all for the A8N-SLI premium?
My config is 2 GB Opteron 165 no overclocking and
Nvidia 7600GS PCI-e (tried nvinkjet and natit) didn't worked no display detected.

Thanks for your opinion in any case.
Dragon