Is this phone still worth it?

Hello all. I come over from the Nexus 5 forums, and as much as I love my N5, its definitely starting to show it's age with it's out-dated specs, terrible battery, and inadequate storage (I have the Sprint 16gb model). I was looking at different phones to move on to, and even though money is sorrrrrtttttt of a factor (not really), I've been bouncing around what's available and affordable, since I'm sitting on an upgrade right now. My choices are:

Samsung Galaxy S6 - Best camera, decent starting development scene, non-removeable battery and storage, lackluster battery.

LG G4 - Can get for 0 at Best Buy. Good camera, good screen, good battery, removable everything, no development scene.

Or...

LG G3 - Can get for (Read, ONE DOLLAR) at Best Buy. Good camera, good screen, good battery, removable everything, established development scene.


My biggest concern when it comes to buying a phone is how good the development scene is, or how much potential it has. The LG G3 is already established as a fine phone, its just... The G4 has updated specs on an already high-end phone. Which begs the question, is it worth spending 0 for the top of the line, or better to spend for an extremely capable veteran that can still hang with the best of them?

Halp plz.

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