They're mostly going to perform the same, in terms of overclocking and performance. It's just a matter of features.
The DS3R has two more SATA ports, compared to the other motherboards. Also has the most PCIe x1 slots....and the cheapest out of the bunch, so I think the DS3R is a good bet, in the bang for you buck department.
The Blood Iron has the most USB ports.
Other than that. They're mostly the same.