I buy Pasture Raised eggs from Whole Foods, about $6-$8 per dozen. Expensive but the only eggs I've found in the US with actual orange yolks like I found overseas. Even the farmers markets here disappoint. Pale yellow yolks are a very bad sign.
http://blog.chickenwaterer.com/2013/03/influencing-egg-yolk-...
You can argue that it doesn't matter what chickens eat, and you could win. But I'd wager that to a great many people the quality of food does matter.
There is the spurious matter of the nutritional quality of the eggs as discussed here http://www.thekitchn.com/what-does-egg-yolk-color-actually-m...
"Some studies have shown, however, that eggs from pasture-raised hens can have more omega-3s and vitamins but less cholesterol due to healthier, more natural feed."