Old thread, but now that the new models are announced, I want to say:
From the recent news, I would have considered the Szuki Celerio and the Nissan Micra (because they might be available in the US).
My favorite, however, would have been the Skoda Citigo, but the Volkswagen group doesn't sell them in north America (a shame).
It's the same base as the VW up! and Seat Mii.
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View my fuel log 2014 Mirage DE 1.2 manual: 47.8 mpg (US) ... 20.3 km/L ... 4.9 L/100 km ... 57.3 mpg (Imp)