Nexus 4 / Nexus 5
The Nexus 4 has vanished from the Google Play Store, but it's still available on the T-Mobile store and through third-party retailers. Until a new Nexus arrives, we consider the Nexus 4 one of the top Android smartphones.
Thing is, the Nexus 5 is rumored to be making a debut in mid-October which could mean a release late in the month. If that's the case, it will likely take over for the Nexus 4 due to bigger and better specifications including LTE and 1080p.
For now, the Nexus 4 reigns as one of the top options but with a Nexus 5 on the way, it's best to wait a few weeks before buying.