Go pastured. If you can buy direct from a farmer, that's best. Organic and cage-free are essentially worthless descriptions: organic means the industrial chicken farm your eggs came from fed the birds organic corn and soy. Yippee. Cage-free means that the overcrowded henhouse has a tiny door to a 15 x 15 plot that the chickens never explore, and are still fed crap. That's why I like to know the farmer personally, their feeding practices, what they mean by pasture-raised, and besides, almost no shelf time.
Check eatwild.com for local farms, or find a good farmer's market.