I bought the BH6X which is the MOTO 1900 mAh battery and I can't believe they wouldn't just ditch the stock battery and use the 1900 mAh one. I unplug my phone every morning at 7AM, use it moderately throughout the day, (I am not always streaming data mind you) and by the end of the day which is usually around 11 or 1130 PM I plug it back in and I usually have between 70 & 80% life.
The MOTO BH6X is a good deal I think and it really adds no bulk to the phone other than the fact that the extended battery cover (100% necessary to prevent phone damage) sticks out MAYBE 2 millimeters at the most!