I'm sorry to hear that the VIA system isn't working out for you.
I'm currently trying to track down what the problem is with some
of the ACPI config changes I brought in to accomodate nForce4 systems.
They seem to trigger a problem in the MULTIPROCESSOR case.

Is there any way that you could try a -current kernel and see if
the problem still happens and if so, if the panic message/backtrace
is a little clearer?

- Frank