Change, my BlackBerry Curve 8520 for Moto Nexus G or 5 ... - Engadget

I retire my BlackBerry Curve 8520 and I

thought the candidates are the Moto Nexus G or 5. It would be my entry into Android. What do I recomendáis?
I knew that you would be the Nexus 5, but the issue of battery keep me away.
Thanks.