Bear in mind that the motherboard has almost no impact on performance. If you're going to be overclocking, potentially a better motherboard can squeeze a tiny bit extra out of the CPU, but unless you're pushing your OC to the max, motherboard from a performance perspective is pretty much irrelevant.
What you pay for with a motherboard are features. If I were in your shoes, I'd be putting the feature list side-by-side and seeing whether the additional features on the more expensive boards are worth it *for you*. Generally speaking, high end motherboards are not a good way to spend your budget if bang-for-your-buck is the main goal. But you might value USB 3.1Gen2, M.2 slots, extra SATA ports, NICs, better audio solutions, etc... if those things add value for you then the higher priced boards might make sense.