Great to see you write on this crucial topic Steve, keep it up.
I agree in general that the world would be a better place if we all significantly reduced our consumption of farm-raised animals, but Im not convinced that reducing our animal consumption is the action we can take on a personal basis that has the biggest impact in terms of saving the environment.
I highly recommend you to check out a marvelous little book available online for free published by David MacKay, Prof. of Physics at the University of Cambridge, "Sustainable Energy Without the Hot Air":
David MacKay: Sustainable Energy - without the hot air: Contents
I'd never read a more straightforward, simple, yet well researched and relentlessly fact-based analysis of the issue of the environmental impact of human activity.
As you will see, according to Mac Kay a vegetarian diet has an important impact, but in terms of saving energy, there are other actions that have a more dramatic impact, like driving less, buying less stuff and avoiding packaging.