Remember that you can't just go by the watt rating alone.

This PSU is technically 850W, and it has enough PCIe plugs to handle 2 Ants, but there are some major issues! First, load balancing the rails would be a giant PITA. Second, I wouldn't guarantee the quality. And third, and most importantly, it can only handle 720W (60A) for all of the 12v rails combined. This is barely enough to handle the 2 Ants at stock, and you wouldn't be able to OC at all. Consider this a PSU to stay way from.

On the flip side, you have this PSU. Same max wattage, same number of PCIe plugs, but it's a strong (70A) single rail (no load balance, and no OC limits), and it's by a more reputable company. You could easily handle 2 Ants on this PSU with no worries.

If you really want something that's simple amazing, try this PSU. It's very similar to the one above, but is 92% efficient (80Plus Gold), and is completely modular. You would be hard pressed to find a better PSU for 2 Ants.

In short, don't skimp on the PSU. It has the ability to make your mining ventures a constant pain in your neck, or it has the ability to make your rigs completely rock solid.