The 970 issue is blown out of proportion. It's been somewhat fixed in drivers, and only reproducible in horribly designed PC ports.
Ignore them.
The 970 will do fine.
Anyways, if you're getting a K-class CPU, it's a good idea to match it with an overclock capable chipset. My 4790k runs at 4.0 ghz stock just fine. And it's the previous generation. While performance hasn't gotten leaps and bounds better from Haswell -> Skylake, you'll likely be fine at stock clocks, especially because Intel does that Turbo boost deal.
My recommendation would be to go for a chipset that *can* overclock, but don't bother overclocking until you run into something that needs just a *little* more power, which you won't. For a long time.
Ignore them.
The 970 will do fine.
Anyways, if you're getting a K-class CPU, it's a good idea to match it with an overclock capable chipset. My 4790k runs at 4.0 ghz stock just fine. And it's the previous generation. While performance hasn't gotten leaps and bounds better from Haswell -> Skylake, you'll likely be fine at stock clocks, especially because Intel does that Turbo boost deal.
My recommendation would be to go for a chipset that *can* overclock, but don't bother overclocking until you run into something that needs just a *little* more power, which you won't. For a long time.