i7 build needs advice and I have a few questions

[sinthrax]

[PCPartPicker part list](http://pcpartpicker.com/p/WQXngs)
[Price breakdown by merchant](http://pcpartpicker.com/p/WQXngs/by_merchant/)

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($359.99 @ NCIX US)
CPU Cooler: NZXT Kraken X61 106.1 CFM Liquid CPU Cooler ($114.99 @ B&H)
Motherboard: Asus Z170-AR ATX LGA1151 Motherboard ($179.99 @ Micro Center)
Memory: G.Skill Ripjaws 4 series 16GB (2 x 8GB) DDR4-2400 Memory ($114.99 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($89.75 @ OutletPC)
Video Card: MSI GeForce GTX 980 Ti 6GB Video Card ($678.00 @ NCIX US)
Case: Fractal Design Define R5 (Black) ATX Mid Tower Case ($99.99 @ Newegg)
Power Supply: EVGA 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($111.99 @ SuperBiiz)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($16.89 @ OutletPC)
| *Prices include shipping, taxes, rebates, and discounts* |
| **Total** | **$1766.58**
| Generated by [PCPartPicker](http://pcpartpicker.com) 2015-08-29 20:57 EDT-0400 |


This is what I threw together as decent from reading. If there are any things you would change please let me know why. I am up for changes if it makes sense.

I already have the extra HDD, monitor, keyboard and mouse.

Also, I haven't built in a while and this m.2 thing is new to me. What are the advantages and can you use it as a primary drive. Is this thing even recommended? or is the 850 EVO fine. What are the advantages/disadvantages?

I am looking to get this as soon as I can find an i7-6700k. I looked today and every vendor I seen was sold out of them. I can wait. I would like as much advice/changes as I can get up until that time.

Thanks in advance.

 

[DookieDraws]

That build looks fine to me! I have no experience with the m.2 drives.