The LG G Watch just went on sale in the US recently. It can currently be found for $299.99 at AT&T's online store and on the Google Play Store. As far as specs go, the LG G Watch R has most of its competition beat, especially considering its IP67 water resistance and larger battery. Aesthetically it's not as attractive as the Moto 360, but it's still much better looking than anything Samsung is offering in the Android Watch world.
Here are links to get the device at both mentioned retailers:
Here's our Android Watches section for more discussion: Android Watches Android Forums at DroidForums.net