I'd go with the Moto X Pure. The Nexus 6 is nearing a year old, and the 5X is honestly underwhelming. The appeal of stock Android aside, I just don't think it holds up at that price range. The Moto X, by your prices, is cheaper, has a larger battery, and offers a microSD slot. The 5X does have a fingerprint scanner though, and a Type-C USB port.
Really depends on what you want out of your phone and whether you want a phablet or not. My personal choice would be the Moto X Pure.
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I have asus zenfone 2 and please do not buy it ,here is the reaons
- camera quality is not good
-Screen blinking time to time and each phone has this issue ,everybody waited for update for correction
-no good support
-battery draining issue
-no android 6.0
there is no update for next release of android .