Hi guys,
I'm planning my flight to EZE, and I'm wondering which carrier is the most decent of the options available:

United
Continental
American
Mexicana
Aeromexico


Last year, I took American direct to EZE from Chicago, but they don't offer that route anymore (and besides, we had an AWFUL crew/experience with AA). I don't get to fly biz class, so I would love to have the most comfortable economy experience as possible.