Voted for a little longer EV range since I can't make the 38 mile trip to and from work (no charging at work ...yet) in the winter, but a big second for me would be to make a Volt wagon. Just as low as the current volt but longer with a larger cargo area. Not an SUV.
<edit> Even as an EREV SUVs will not be nearly as efficient as a compact wagon like a wagon Volt.
<edit> Even as an EREV SUVs will not be nearly as efficient as a compact wagon like a wagon Volt.