oh, my favorite rant subject... the above mentioned films and books are a great resource!
in addition, a wonderful web resource is http://www.eatwild.com/ . you can connect with smaller farmers in your area that are raising their animals in the proper way. It's very, very difficult to get great meat in the grocery store. In larger chain stores, nearly impossible.
If possible, try local farmers / farmers markets. These will be the best sources of all, and if you can find a farmer willing to sell directly to you, can be quite cheap. The labeling on most food is so manipulating and misleading that often you imagine you are buying one kind of product, when in reality, you are being sold something very very different.
Kudos to those who pointed out "cage free" and "free range" don't mean much.
Even if cost is not an issue, consider buying organ meats, they're often less expensive and much more nourishing than muscle meats. The website "offal good" has some great recipes and info. To further bring the price of well raised meats, buy on the bone varieties and make stock from the bones later. Super easy and rewarding. "Meat" by Hugh Fearnsley-Whittingstall is a good resource for more on meat thrift.