After a truly ridiculous amount of research, I think I've narrowed things down to two choices:
- Nokian WRG3
- Continental PureContact
I am strongly leaning towards the Continentals as they seem to do as well as the highly-touted Michelins (at less cost) and - in some cases - rather better. The advantage of the Nokians is that they become truly all-weather (which is an issue here in Wisconsin), however: the primary user of the vehicle commutes less than 3 miles (one way) and we have a different vehicle with dedicated snow tires (Nokian Hakka SUV) for the inclement weather that otherwise sits unused (except for road trips, etc.). The Nokians are a bit more than $200 more expensive as well, despite the stellar success I've had with their dedicated snow tires.
I had originally considered the Pirelli Cintaurato P7, however the not-very-impressive test scores in the wet pushed them out of the running.
I currently sit around 5.3 m/kwH per the car.
Surely cold weather (more heater / heated sets / heated steering wheel, etc.) will negatively impact the "mileage", and I'm sitting at 86% SOH so I'm likely to lose a bar soon (20K miles, 2013 Leaf).