Unfortunately, the i7-6500U's are dual cores and the performance is only marginally better than the i5-6200U, and you pay about $100-150 increment in price for it. I'm not entirely sure how well a dual core processor (even if it's an i7) can utilise the 16GB of DDR3 (not DDR4) ram.
I think it depends on what you intend to use it for. Spec wise I think the Aftershock M-15 series may be better at that price range, except it isn't a 4k screen. You can probably check it out.so at 1.6k...not bang for buck?
plus asus k series don't really have nice screen. Recommend Aftershock m15 for that budget you have.