Well, choosing eggs is easy! It just depends on if you want to be ethical (free run), cheap-assed (the large ones), extremely cheap-assed (the small ones) or slightly confused about life in general (omega).

you misspelled credulous as "ethical".

Good point, x_the_x.

I forgot that the free run chickens don't live in much better conditions than the ones packed into tiny cages. It's not as if they are running around a field; they have barely more room than the caged ones. If you disregard the strange picture of Pamela Anderson-Lee,

Free Range
Generally speaking, free-range eggs come from chickens who have some access to the outside, but how much access? The U.S. regulates the use of the term on chicken but not on eggs, and doesn't stipulate how much outdoor time is required. Canada regulates neither. No other criteria, such as environmental quality, size of the outside area, number of birds, or space per bird, are included in this term. Typically, free-range hens are debeaked at the hatchery, and have only 1 to 2 square feet of floor space per bird. The birds may or may not have litter and access to nests and perches.

I've purchased (half carton) eggs maybe 3 times in my entire life. I don't eat them, unless they are undetectable in foods, and only use them if I'm baking something. I've also been that confused person standing in front of the eggs wondering which ones to choose. However, I just learned today from Chef at Home (Food Network)that there's no difference between brown eggs and white eggs!