If you need more range you need to buy a Tesla. They even have a new battery coming in the 2015 S that has 40% more range and a 50% longer life.
I have a 2013 LEAF and am waiting for the new Tesla 3rd Gen to come out on 2015-16 time frame. It maybe a long wait but the LEAF meets more than double our needs most days for work commuting. The 2013 is really better with more range and a battery that seems to be better in the heat. The Air Cond Heater is also a Heat Pump and twice as efficient as other EVs. I also leased a 2013 Focus so we can compare and so far they are very similar in range.
But my favorite is my ELF from Organic Transit in NC. http://www.OrganicTransit.com
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It's more fun per miles and can go 1,800 MPGe on peddle and solar!