If you're a beef eater, it is to your benefit to look for grass-fed beef. When cows graze on what they would eat if not domesticated, instead of on the foods that are pro-inflammatory to any animal, the resulting flesh is higher in omega-3 fatty acids.
I recently learned about a Uruguayan/Argentinian brand of beef, Estancia, that is grass-fed on native grass (no rainforest destroyed for these ranches), that is available in the Western United States. It's primarily sold in California, but because Arizona sits between California and the Texas ports where this beef is unloaded from the boats, and the trucks stop off here on the way to their destination, we can get it in our Fry's Signature Stores as well.
Here is the information on nutrition and health from the Estancia website. If you do not happen to have this particular brand in your local area, be sure to ask your butcher what brand they DO have with similar characteristics. The more a butcher or store knows a product will be sold, the more likely it is that they will go through the trouble to bring it to their shelves.