Regarding K70 tires - I'm a fan; they look good and ride good. But I've found they don't last long, you can kill a rear tread in just a few thousand miles. This has been discussed many times here over the years.
On another forum, someone suggested, "try and get the more expensive Japanese Dunlops as the Indonesian made K70s wear out a lot faster." This is the first I've heard of such a distinction, and I'm not sure how this could be pursued. I think that person is in the UK; suppliers there may be able to distinguish between them. I certainly plan to look into this the next time I purchase K70 tires...