need advice with my first build

[Shayev13]

Budget is 1,500$
CPU-
Intel Core i7-4790K Processor (8M Cache, up to 4.40 GHz) (BX80646I74790K)
Motherboard-
ASRock Z97 Extreme4 LGA 1150 Intel Z97 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Memory-
Crucial Technology 16GB (2x8GB) Ballistix Elite Series 240-Pin DIMM DDR3 PC3-14900 Memory Module Kit
Storage-
Samsung 840 EVO 500GB 2.5-Inch SATA III Internal SSD (MZ-7TE500BW) +
WD Blue 1TB SATA 6Gb/s 7200rpm Internal Hard Drive
Video Card-
ASUS STRIX-GTX970-DC20C-4GD5 Graphics Cards STRIX-GTX970-DC20C-4GD5
Case-
IN WIN GRone White 0.8mm SECC Steel ATX Full Tower Computer Case
PSU- SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Any advice would be greatly appreciated because I'm very new to building PCs, this one will be used for a lot of multi media like editing video, 3d animation/modeling and some graphic design. I'll also be gaming a hefty amount on it. The main thing I'm worried about is the parts not fitting in the case or the parts not being compatible ect. Also not sure if you guys think I should buy any extra fans to add to the ones that come with the case.

[camerongray]

Looks good but I would recommend getting a better brand of motherboard such as Gigabyte or ASUS, shouldn't cost that much more.  If you aren't going with two video cards there is no need for an 850w PSU, you could save a good amount of money by getting a 550w-650w unit.

[Shayev13]

Yeah, motherboard is the thing I'm least knowledgeable about so I really had no clue what brand is best quality and stuff so I'll look into those. The high wattage PSU is so I know I'll have the power if I need it for future upgrades or anything else I might need, I may drop it down to 750 though.

[Shayev13]

UPDATED BUILD LIST:
CPU-
Intel Core i7-4790K Processor (8M Cache, up to 4.40 GHz) (BX80646I74790K)

CPU cooler-
Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler

Motherboard-
Asus Z97-A ATX LGA1150 Motherboard

Memory-
Crucial Ballistix Elite 16GB (2 x 8GB) DDR3-1866 Memory

Storage-
Samsung 840 EVO 500GB 2.5-Inch SATA III Internal SSD (MZ-7TE500BW) +
WD Blue 1TB SATA 6Gb/s 7200rpm Internal Hard Drive

Video Card-
ASUS STRIX-GTX970-DC20C-4GD5 Graphics Card

Case-
Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case

PSU-
SeaSonic X Series 850W 80+ Gold Certified Fully-Modular ATX Power Supply (Debating going down to 750W)

Monitor-
Asus VG248QE 144Hz 24.0" Monitor

[camerongray]

Looks fine to me as long as you are sure about that PSU, you are spending a lot more on something you'll never need unless you go SLI in the future.

[onepiece]

To me the motherboard you choose is the only thing I would never buy. Beside that little problem, everything is good enough (for me) 

[patio]

HuuH ? ?