BravelySam :
That'd be amazing for sure, but I dunno if I'm gonna wait that long. I'm planning on building something that'll play games at 1080p with no problems. If I got the 1440p monitor I'd want and a GPU that can handle it on high settings, I'd need a bigger budget. I've only heard bits and pieces about the GTX 1070 and 1080, but won't the 1070 be overkill for a 1080p monitor?
Also, why are the unlocked CPUs faster than their locked counterparts? The only reason I can see for getting one like that is less power consumption.
I'm running a 780 on a 1080 monitor, and my son is using a 970 on his 1080. You don't have to wait for a 1070, I'm just helping you think things through. You're the one with the questions. Usually when people build a computer, they want the latest parts, because they figure they'll last the longest. My 780 is over two years old and is still running fine. So if you choose a 970, don't kick yourself a year or two from now thinking you should have waited a few weeks for the 1070. Odds are this time next year we'll be looking at an 1170 anyway.
One reason to get a Z170 if you're not planning to overclock, is so you could SLI or Crossfire two graphics cards. But if you're not planning to OC or run two GPU's simultaneously, why spend the extra money on a Z170, when an H170 from the same manufacturer will have all of the same features in terms of onboard sound, USB ports, and all the other bells and whistles. The only reason to get the Z series of any mobo is because you plan to OC now, or in the near future.
Although most of what I've suggested was based on your original build and answering questions that you've asked. If it was me, I'd buy the Z170 with plans to OC. I'd buy 8g of at least DDR4-2400 ram. I'd wait for the 1070. I'd install Windows 10. I would not add an internal optical drive. I'd buy an external USB optical drive for the very rare occasion I need it. I'd buy a smaller, mid-tower case instead of a full tower, but this is your thread, and is not about me. I really don't know your budget, and what use you have planned for this computer, and what types of games you like to play.
Unlocked cpus are faster than their locked counterparts because they can be overclocked. Locked cpus can not be overclocked. Yes, overclocking a cpu increases your power consumption and the heat in the case, which leads to more power consumption when you add more fans.
There's a certain level of over-analysis that can lead to paralysis. I've posted several builds that would work well for you. It's ultimately your choice.