Drillingmachine has very strong opinions and it's usually in favour of AMD... I do agree investing in a 2 generation old Intel architecture (Skylake, 6th gen) at this point is probably not the best idea.
I think, if you are going for very high FPS (like with a 144 hz monitor) then with a powerful GPU, this tends to be where CPU limitations come into play. This really favours Intel still due to their higher clock speeds (vs Ryzen), and higher IPC (instructions per cycle). If you are going to go for Intel then it makes most sense to go with the Coffee Lake (8th gen) range I think. For example, the i3-8350K is a quad core 4 Ghz CPU, which generally can OC well beyond that with appropriate cooling, and may be a good choice for this case (as would the more expensive i5-8600K). Don't just take my word for it - https://www.gamersnexus.net/hwreviews/3106-intel-i3-8350k-review-overclocking-vs-i5-8400-r5-1600x?showall=1
If you are gaming using a 60 hz monitor and aren't gunning for sky high FPS then there would be no worries with the CPU holding you back. A Ryzen would do nicely. However, the GTX 1070 would probably be excessive for 1080p. You could argue it could give more future proofing, or you could go with a GTX 1060 to save some money.
Ryzen has a definite edge in highly threaded applications, and is good value overall. The extra threads available on the higher models are an advantage for example if you want to stream in game video. Intel has a definite edge in single thread performance.
To summarise - if your priority is high FPS then this is a case for Intel CPU's, preferably 8th gen K series, along with a good video card capable of reaching your FPS goals.
If you are not aiming for very high FPS with a high refresh rate monitor, then the CPU choice is less critical. If you are going for a 60-75 hz 1080p monitor, a GTX 1070 may be a bit excessive. It would be OK for 1440p. You can argue it adds extra future proofing, but could be an area to cut costs. If really high FPS aren't your priority then Ryzen is probably a better value choice.
As resolutions increase towards 4K, pretty much all games will be GPU limited, the CPU is less of a limiting factor.
Edited by jonuk76, 22 December 2017 - 09:07 AM.