Needing a new PC

[MrTeaBiscuit]

Hey guys, I'm in need of a new PC, my budget is around £900, I already have a 1000w PSU and am looking to get a GTX 970 along with a i7-4790k 4.0ghz. I already have my case sorted and everything but I'm just wondering what CPU heatsink I can use to keep my pc at a nice cool temperature. Any response would be a HUGE help!

 

[MrTeaBiscuit]

I have a Corsair RM1000 and the case I will be getting is a Aerocool Xpredator X3 Gaming Tower Case Chassis Dimensions 533mm (D) x 223mm (W) x 527mm (H)
Carton Dimension 570mm (D) x 280mm (W) x 610mm (H)

I already have this in my basket. https://scontent-lhr.xx.fbcdn.net/h...=7de960d763d3d8f0a5148ad1eafb645c&oe=555805D2

I was thinking about the ACX EVGA CPU cooler, Black - 120 mmACX EVGA CPU cooler, Black - 120 mm but I don't know.

But if you recommend another case and components, that would be awesome!