Found this to be cheaper by $100. Orig price $299. According to Google, it's cheaper by 34%.
It runs Android Wear and only available in black color.
From their website:
Battery Life for the Long Haul: Up to 24-hour battery life with typical use, or up to 5 hours continuous life with GPS and HR monitoring.
Bring Your Music: Sync, store and listen to Google Play playlists via Bluetooth™ headphones. (Supported by Android™ only. Headphones sold separately)
Map Every Workout: Track your course, pace and distance with built-in GPS.
Fear No Forecast: Water resistance up to 5 ATM stands up to unexpected downpours and even quick swims.