A lot of people hating on the 560, I get it.

But, after a good tuned VBIOS flash, this card is producing a slightly better hashrate/watt metric than the 470/570. Some say this card is exactly half of a 570.

Seems like once you consider the $/PCIe-slot cost of the rig (minus the GPUs)...

570s needing 1200watt+ PSU
vs.
560s needing 750watt+ PSU

a 560 build could come very close to matching the break-even, some even say it beats, the Break-Even Days metric of a 570 rig.