i7 6700k + gtx 1070 + 1440p@144Hz

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You aren't going to be pushing much over 60FPS in newer more demanding titles unless you reduce image quality settings. I'd get a 1080 or even the yet to be released 1080 Ti for 1440p/144Hz. The 1070 is a little faster than my 980 Ti and I average ~55FPS in The Witcher 3 with all settings maxed at 1440p. ~60FPS in Fallout 4, 58FPS in Rise of the Tomb Raider etc.
You aren't going to be pushing much over 60FPS in newer more demanding titles unless you reduce image quality settings. I'd get a 1080 or even the yet to be released 1080 Ti for 1440p/144Hz. The 1070 is a little faster than my 980 Ti and I average ~55FPS in The Witcher 3 with all settings maxed at 1440p. ~60FPS in Fallout 4, 58FPS in Rise of the Tomb Raider etc.
 
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