Welcome to Android Central! It would help if you told us a bit more about what's important to you in a phone. The Nexus 5 is a great phone, with its only real weakness being the mediocre battery life. The 2nd gen Moto X is also a great phone, with the advantage of being newer, bigger, and having better battery life. But it's not a pure Nexus experience--you'll still have bloatware, and system updates won't be quite as prompt (although with Moto, they're still pretty fast).