[gareim]

Sony Z3 Compact. Is 5.01 inches tall, but your original Moto X was 5.09 and you seemed to like it fine. Fast/recent specs. Runs a recent version of Android.

[xorcist]

Also waterproof! It's a pretty cool feeling to rinse your phone under the tap the first time you do it.

[nevir]

Nice! Not sure how I missed that one, maybe it's the way to go...