What is the best android phone for developing in UE4?

I plan on purchasing an android phone purely for developing in UE4 and was wondering if there was any particular one that people could recommended? I’ll most likely be keeping my old phone for testing, but want something that’s decent for development.
I hear the Nexus 5 is pretty good, but it might be a little dated and perhaps there is something better that’s available now. I also plan on doing work in VR, so that might be a factor to consider too.

If looking it for VR devlopment, then you should check which phone is good for Daydream as it is future of VR in Android. By performance i guess Galaxy S6 is good reference point, but avoid S6 and GearVR or else it will be Daydream compatible.