Thanks! I'll do some more research and look around. 1070 is quite the bit more expensive here in Sweden, which is partly why I'm considering a 1060. As for warranty and coverage, that shouldn't be any issue.The 2600k is getting up there, but if you have a OC you should be ok at 1080p for some time. As far as your GPU, if you're planning to keep it for the length of time you say, then 1070 is worth the price increase over the 1060.
Main differences between cards are power draw and number of fans. The Asus Dual has 2 and the Strix has 3 for example. Differences between brands really comes down to warranty and coverage. EVGA is going to be the best in this area, and who I would go with. I've had plenty of ASUS stuff and had a 1060 Dual and 1079 Strix at one time, they were fine, but the thing with Asus is if you have any issues you have to deal with their customer support and it's awful.
Since you seem to know your stuff, may I ask in what way the 2600k might be getting up there?
Also, would you say the faster memory in a 1060 card is worth it? Not sure how this works.