What is the best CHEAP media consumption tablet/phone/player under 400$?

I realized that my phone is always warning me that it's running out of space. I can't help but add more files and all I can do is to delete the other files. I am currently using a 32GB iPhone 5, and while it may seem that 32GB is really big, it becomes really small when you get accustomed to it.

So now, I am planning to buy something worth it for entertainment. I am not much of a gamer so mid-range specs would do. HOWEVER, that doesn't mean that I want to settle for mid-range. I hear that the Zenphone 2 (not the laser model) is faster than most androids out there. Also, Samsung is rocking out with the Galaxy A5.

Anyways, here are the conditions:
1. Can play music and movies for hours without running out of juice.
2. Has a good display. Preferably, 1080p displays, or higher (if there are, for that price range). If no, then at least 720p.
3. A screen greater than 4 inches, and has great viewing angles.
4. Qualcomm Snapdragon 600 would probably my cut-off processor.
5. LTE function. (LTE A would probably be in a better, flagship phone. But if there exists one, then good.)

All the others that are not mentioned are the ones I don't really care about. I don't need a very good camera or a very good looking design. I have different specialty-gadgets for other things that are offered by these phones. After all, I am looking for a sub-$400 phone.

Thanks in advance, and I hope you'd give multiple suggestions based on objective reasoning, and personal opinion.
Added (1). Also, a Micro SD slot, up to 128 GB. If not, then a 64 GB internal memory.

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