Seriously? The S6 and iphonie over the Xperia Z5? It's available in "north america" (canada for Z5, and USA for Z5 premium), it has less preinstalled garbage than both, it has better preinstalled software than both (music software is second only to Zune's stuff), and specs that beat both (premium is a freaking 4K 5.5" phone with better camera and great (if a bit hot) processor)
I have a Verizon Motorola Moto E (2nd gen). Wish I would of went with a phone with 2gbs ram instead. The 1gb ram just doesn't cut it anymore with android smartphones. Good for phone calls, basic apps, and web surfing(light gaming). Bad at multi-tasking, occasional browser crashes, and small storage 8gbs(32 SD card). But hey they're dirt cheap and reliable, got mine for $50,($30 now online).
Hoping one day smartphones will have modular ram for upgrading, like SD cards.
I'll have to grab a Note4 soon, it appears to be the last of the Notes with a removable battery and SD card. My Note3 is starting to give weird color flashes (like when it overheated), so I will have to see how long it can still go.
Low end pick should be the ZTE Zmax 2. 1280x720 resolution, 2GB of RAM. 16GB of storage, microSD card slot and snapdragon 410. All for $130. Your Motorola pick means you haven't actually looked for anything else.
Call me an Apple-hater, but the iPhone is NOT that good. Maybe it has good hardware, horrible iOS. It's simple, yeah, because it can't do anything!!! I also found its Settings very difficult to use. I have an LG G4, and I love it, and although I do wish it had a better battery, I can easily switch it when it is dying with the spare LG gave me for free. On an iPhone and Galaxy S6, you can't even take off the back.
And Nexus is nowhere to be found...
Also, as someone else mentioned, security is extremely important. iOS and Windows Mobile 10 both have great security, except from the companies that made the OS themselves (Apple and Microsoft). Android has fair security, but much more vulnerable than the other two. I would say BlackBerry wins in security, even with the Priv.
I am considering going back to a non-smartphone. The one I had, the Pantech Matrix, still works great. Battery lasts for 2 weeks at a time, no need to deal with annoying touch keyboards, no security risks except from the cell phone company spying on text messages, extreme durability without a case, no expensive data plans, and super simple OS. And fast! I'll just keep using my LG G4 as an MP3 player of sorts, but I'll usually use my Surface 3.