The biggest thing for me was reading "the ethics of what we eat" - finding out that the "grain-fed beef" is so disgusting and makes cattle sick - and that pasture fed is the most ethical choice if you're eating beef.

I find the hardest thing is trying to get DH to buy ethically instead of cheaply.
I'd just like to point out that that book was mostly based on US feedlotted beef and as taken from the book;

Many pages detail sickening beef feedlot (mass pens) conditions not present in Australia. The book acknowledges this, but reference to the Australian situation is piecemeal and uneven, with figures not always converted to metric and not applicable to our industry.
The authors acknowledge that Australia's feedlot industry is relatively small, mainly for "finishing" export beef. Their reckoning is 70-day confinement for 25 per cent of the beef industry. In fact, most of the 29 per cent of feedlot cattle here are "medium-fed" for 120 days, or "long-fed" for 200 days, according to the Australian Lot Feeders Association.
The bold type is mine

Very very little purely feedlotted, grain fed beef makes it's way onto your dinner plate. It is expensive to buy and grain is used purely to bulk up the animal for export because of the high protein content in the grain. Now I don't necessarily agree with feedlotting animals on a long term basis - mainly from an animal welfare perspective because there are no trees or shade and they are on bare dirt nearly the entire time they are in the feedlot. BUT feeding both grain and grass is the ideal because feeding cattle only on grass is not without it's evnironmental toll either simply because of the sheer volume that they need to eat in a day, hence why they are supplemented with grain. And Australia does NOT import beef or beef products at this stage but there are moves to open import markets for beef which is currently being fought against.