If you will definitely crossfire in future then the intel build is the better choice
If you wont crossfire then IMO build the AMD , but use a cheaper motherboard with a 970 series chipset . Best available is probably the Asus M5A97 evo , but the Asrock 970 Extreme4 is also an excellent choice since it has a 990X chipset and can crossfire anyway
and then the price difference is larger and the AMD option well worth it
Unless you have multiple monitors you will not be needing crossfire any time soon , and by the time you do there will be a newer better generation of graphics cards available and you'd always be better off buying one of them instead
So... The i5. I'd rather spring the extra $30 on the GPU and have the extra power just in case. Plus the MOBO I listed has 2x PCI-e 3.0 ports while the one you listed has one.. I know that doesn't make a big difference, but it might in the future.