Nvidia's latest 780i chipset is already on allocation. This refurbished Nforce 680i with an additional chip has been completely sold out.
This is the only board that will work Yorkfield generation of CPUs and will be able to bring dual or triple SLI. If you want more than one Nvidia-based card, this will be the only future proven chipset for you.
The current options include EVGA or XFX; but MSI, Asus and some others are working on their own versions.