People have different opinions on Mobos. Some people just get something really cheap because it's an easy way to save money. I prefer to get a more expensive one for two reasons:
1) You are sure you don't have to worry about any bandwidth issues (no sense buying expensive CPU/GPU to be throttled by a cheap mobo.
2) They are a real pain in the ass to replace/upgrade, so if you get a good one at the start, you can keep it for the life of the rig.
Now, that doesn't mean you need to go crazy. For instance, here are two Asus mobos, one for $200 and one for $150:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813132565
http://www.newegg.com/Product/Product.aspx?Item=N82E16813132566
What are you actually getting for the extra $50?
Turbo-boost (this actually isn't true; if you look here https://www.asus.com/us/Motherboards/Z170-A/specifications/ you'll see all Z170-A support Turbo-boost even though it's only advertised on the more expensive one)
More BW on your PCIe slots (This could be an issue if you were to SLI or have a lot of other PCIe slots. But with just one GPU, this can't possibly matter, imho)
Better Audio Chip (Who cares? If you care about audio, you should buy a separate card, not spend more on a mobo)
Some other small things.
Personally, I wouldn't recommend the $200 one as you start to see real diminishing returns. And, these are only the Asus models. MSI and Gigabyte also make good mobos, but I have always had good experiences with Asus. I took a brief look at MSI and Gigabyte and they didn't seem to be having any particularly good deals. For instance, though, this Gigabyte appears equivalent to the $150 Asus but is $25 cheaper:
http://www.newegg.com/Product/Product.aspx?Item=9SIA24G3KG3691
If you wanted to go even cheaper, you could get something like this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128843
It's not a bad choice by any means, but it's not what I would personally do. Of the ones listed here, I would go with http://www.newegg.com/Product/Product.aspx?Item=N82E16813132566 but really any here are fine, it's just what you're willing to spend for what you get.
Here's another one that seems reasonable: http://www.newegg.com/Product/Product.aspx?Item=N82E16813132567