There is no correct countepart. AMD's AM3+ socket is at least a few years old, and Intel's H97 uses socket 1150, which is still old, but is of a newer chipset, and supports new CPUs.
If you're just looking for a motherboard that supports 3 way SLI/Xfire, the ASUS Sabertooth 990FX Rev 2.0 supports 3 way GPUs. But I'm more than willing to be that you'd easily find a bottleneck with an AMD CPU and three GPUs.