I confess that I was a little disappointed in the EPA and Motor Trend numbers. I had hoped that the 300 was going to be the equivalent of the EPA number, and that careful driving would allow exceeding it, while inattentive driving would yield more like 265.
I'm going to be watching the Supercharger announcement closely. I chose the 60kWh pack because I thought that with modest driving, I could expect 230 miles of range from it in good but not perfect conditions when new. But if that's the 55-on-a-flat-windless-road number, and if the Superchargers are not in the locations I require, or there's some unforeseen limitation in their use, then I might opt to bump up to 85.