At that range, you probably won't go wrong with the upcoming
Redmi Note 4 IMO, especially if it comes with the SD653 instead of the rumored SD625.
Honor 6X looks tempting on paper, but from my understanding,
Huawei tends to cut corners with sensors, etc. With Huawei, you're unlikely to get all the hardware and software functionality of
Xiaomi or
Asus, at least that was the case with its last year's models.
Now that Asus has gone full retard with its pricing, the RN4 will probably be your best bet IMO. What's more, you'll save some money as well, as Xiaomi is likely to price the 4GB+64GB version at around 12-13K. It will launch tomorrow.
However, it you can make do with 5-inch screen, you can also look at the
Lenovo (ZUK) Z2 Plus, which comes with almost stock
Android Marshmallow and
Snapdragon 820 for exactly 15K after getting a price-cut last week. All these phones will have ordinary cameras, though. At these prices, something has to give. If you want power, sensors and everything, cameras will suffer. If cameras are your main concern, get a
Samsung A-series phone or maybe the upcoming
Galaxy C5 Pro, which will likely be in your price-range. They'll suck in every other way, but will have better cameras than any of the Chinese devices.
My suggestion will be to at least check out the reviews of both the 6X and the RN4 before deciding. I'm thinking about getting the RN4 myself. I won't touch Sammy with a bargepole unless I have a 60K budget. And then, I won't look at anybody else.
P.S.- BTW, if your budget is 15K, the
absolute best option would have been to spend just 4K more to get the
OnePlus 3 from
Flipkart last week! That was an absolute steal! It is on sale on
Amazon for 28K!! I'm only thinking of the RN4 because I'm a
garib aadmi with a max budget of ~10K LOL (Ideally lower hehe).
😛