I think you should reconsider AWD. Unlike gasoline cars, there are a couple of benefits for electric cars. The drives are independent, so if there is a failure, you will still be able to drive the car. Also, it appears as if they have enabled some sort of range mode on these cars and so you should actually get more range from the AWD version. In my Model S AWD, I am getting a lot more range out of the car.
Brent