Is there a tier 3 escalation contact?

Hi,

I have a dual 2.7 G5 which started having problems a little over two months ago. Specifically, extreme temperature spikes and wild fan behavior. There were no changes made to the system prior to this occuring. I tracked these events in ThermographX. I reinstalled the OS on clean drives. I pulled all third party peripherals, including ram. I ran the diagnostics from the G5 install disk. Nothing helped, and the evidence continued to show exterme temp surges. Finally, I called AppleCare (yes the machine is still under warranty).

The result was that I was instructed to cart the machine over to an Apple Store, and leave it with them, which I did. After a week, I get a call back saying they don't see any problems. I asked the guy what he did to test it, and he rattled off a bunch of techno babble and told me he could not show me any test results because they were "confidential", and all he could recommend was to buy a new machine.

So, I called Apple Care again, and escalated to tier 2. They basically had me run the same tests I did before, do some screen caps, send documentation by email. After a couple of weeks of that, they said I could take the machine back to the Apple Store. After I asked what they would do different this time if I took the machine back in, the response I got was "the same tests." Anyway, I am at my wits end. The machine is just not operable, and it's for my business. Does anyone have any recommendations? I feel like Apple Care is sending me around in circles, and all I want is to get this machine fixed. Is there a tier 3 escalation? Maybe I should just call Steve and ask for some help.

Thanks for the help in advance.