Best upgrade for my pc - 600$ Budget

[Juan Francisco Verhook]

My current pc:
Motherboard: FM2A55-VG3+
Graphic Card: Nvidia Gtx 750 2GB
Processor: Amd apu a8 5600k
Ram: 4 GB
Case: Rosewill FBM-01 MicroATX Mini Tower Computer Case
Storage: Western Digital 7200RPM 1TB Hard Drive

Approximate Purchase Date: October

Budget Range: 500-700 Before Rebates; Before Shipping

System Usage: Gaming in ultra settings

Are you buying a monitor: Yes

Parts to Upgrade:
I´m trying to keep my motherboard and going with an AMD Athlon X4 860K cpu with a r9 290, do you recommend changing my motherboard and processor? And my ram obviously

Do you need to buy OS: No

Location: South America

Parts Preferences: None

Overclocking: Yes

SLI or Crossfire: Maybe

Your Monitor Resolution: Want to get anything with high resolution with good frame rates playing the latest games. (Witcher 3 *_*)

Additional Comments: I would like a quiet PC and a nice looking case.

Why Are You Upgrading: I want to be able to play the latest games with high settings.

 

[Icaraeus]

Get a GTX 970, Intel i5 4440 and H97 motherboard, and another 4GB RAM. If you want another case, Corsair and Fractal Design make good cases but they're expensive.

 

[Juan Francisco Verhook]

Get a GTX 970, Intel i5 4440 and H97 motherboard, and another 4GB RAM. If you want another case, Corsair and Fractal Design make good cases but they're expensive.

Will all that fit in my case?
Can you link the exact motherboard you recommend?
What cooling would I need?
Thanks in advance

 

[Icaraeus]

Stock CPU cooler will suffice. Under no circumstances would you ever need an aftermarket cooler since you won't, and won't need to, overclock your CPU. It will fit in most mATX cases and pretty much all ATX cases. I highly recommend the Fractal Design cases. The ASUS H97-PRO is a good motherboard.

Keep in mind that you do require a good PSU. Something like Seasonic, Antec, XFX, Corsair (HX/AX/TX) 550W.