This is where I would have to disagree slightly. My opinion on purchasing American is that one should do so if they are competitive in the segment. The 'Aveo', while not completely outclassed by the Fit, Versa, and (less so) the Yaris, is definitely below them in my opinion. Based on price, engine performance, and comfort, I would go with the Versa Hatchback. I was pleasantly surprised by the interior quality.
Therefore, if you are willing to purchase non-American, my money is on the Versa until the new Fit and Fiesta arrive.