The i5 4670k is the best-performing gaming CPU in the market. It needs a z87 mobo. The best mobo brands are ASUS, MSi, and Gigabyte. Find a god one for around $100 and you will be set for any game.
Also, because you are getting a GTX 760, consider buying that card from MSi, and then also purchasing an MSi motherboard. The Msi Gaming series stuff is nicely compatible and allows you to very easily (and safely) overclock your GPU to dramatically boost your in-game performance. Basically, just look for the red MSi dragon on your GPU and motherboard if this is interesting to you.
Hope I helped