Which phone for Android development?

I have nothing but praise for the LG Nexus 5. It's rocking a stock Android (already got the Android 6.0 upgrade) and is an awesome phone all around.

Besides the Nexus 5, I think you should also try and invest in some other phones that will give you the range from low-end, cheap, shitty Androids to mid and large-screen devices. Just to cover your bases and find out any platform/device/resolution-specific bugs.

Also, the new Nexus 5X seems nice, but I haven't got a chance to try it out yet.