"Alright, I'll go ahead and take a look at those soon. Surprised that DDR4 RAM is so cheap now, and motherboards that support it are too. Last I had checked DDR4 and the board and chipset that supported it were quite expensive.
How much of an actual improvement if you don't mind me asking is DDR4 over DDR3?
Also may I ask why you picked the 850 Evo over the 850 pro? From my research, the Pro is about 5 seconds faster in most cases with boot speed, and uses the latest technology with the board stacking, NAND3 I believe they called it."
Ya the DDR4 pricing has fallen pretty nicely in the past few weeks, always good news for us. Before Skylake/100 series PCH the only boards that supported DDR4 were the X79/X99 boards and yep they are pricey, even today. This new CPU/PCH from Intel sort of brings DDR4 into the mainstream as from this point on most everything will be using it. The LGA 1151 boards did take a bump in pricing over the LGA 1150 boards but not that much, they are still alot cheaper than the 2011v3 boards thankfully. When comparing DDR3/DDR4 of the same spec there is really no difference of performance, but DDR4 will reach speeds that DDR3 won't. And that is where we are going or should I say already there so why not build with it instead of the memory that has seen it's day, longevity and that sort of thing.
The EVO is a bit cheaper and I don't think anyone could tell the difference in the real world of normal use unless they sat around and ran benchmarks all day. The difference between them is pretty small but as you say the PRO is faster, the difference between most all mid to high end SSDs is pretty small really. If you can find a PRO at a good price then go for it as it's a great drive. The storage world is going through some interesting changes right about now with the introduction of PCIe drives that make even the very fastest SATA drive look like a HDD. I wonder why the MB makers are not adding a U.2. interface to their boards (basically a M.2. that cables to a 2.5" drive instead of a small card), Samsung has already came out with one but not with the NVMe protocol, just PCIe 3.0 x 4.
http://www.anandtech.com/show/9650/samsung-announces-950-pro-ssd-their-first-consumer-vnand-nvme-ssd
About that ASUS Z170-A, I just picked that one because of the name and pricing and I read a review on it, I have not read a lot of reviews yet as they are still pretty new. But the ones I have say good things about all of them so far, they all do what they say and are pretty stable for OCing. So you may want to do a bit of research on your MB to find the one that is right for you. They all look really great I think, seems we have finally gotten away from racing red for the top end stuff, even the ROG boards have went in a different direction. It looks like you can stay under $200 and get a great board from whoever you chose.
PS: Could you point me to the link where you read a 850 PRO boots 5 seconds faster than the EVO? That just does not seems right for some reason.....
Here is a guy that has a lot to say about some Z170 gaming boards, pretty short and to the point perhaps worth a look see....
Best 1151 Z170 Skylake Gaming Motherboards for the Money 2015
http://www.anandtech.com/show/9485/intel-skylake-z170-motherboards-asrock-asus-gigabyte-msi-ecs-evga-supermicro
http://www.toptengamer.com/skylake-gaming-pc/
Intel Skylake Z170 Motherboards: A Quick Look at 55+ New Products
by Ian Cutress on August 5, 2015 7:59 AM EST
http://www.anandtech.com/show/9485/intel-skylake-z170-motherboards-asrock-asus-gigabyte-msi-ecs-evga-supermicro
You may have already seen these but maybe not, Anandtech has review a few boards now and does a good job, that is where I read the ASUS review.