Replying to Xbox 360 heat sink update?

Okay so recently my xbox 360 died, and apparently my warranty did as well.

I have heard rumors of an added heat sink that prevents the system from overheating and the dreaded RROD problems.

I am wondering if anybody knows, or knows how to find out WHICH consoles have the added heat sink. I have heard that refurbished consoles and elites had them. However some of those articles dated back to 2007. Do all consoles come with the added heat sink now? Is any of this confirmed?

More or less, I would rather pay some extra cash for an elite if it means I won't have to go through this for a third time. Thanks a lot to anybody that can help.