I find I get a lot of my protein from shakes because my job has me running around like a one legged man in an ass kicking contest most of the time. I still like to mix it up and eat eggs (I prefer eggs from chickens fed flax seeds for the omegas) with Ezekiel bread in the morning along with some oatmeal. I also love Chik-Fil-A too much to stop eating chicken and steak is almost a religion tome.
I don't like the vegan idea at all because it is an extreme lifestyle if followed as intended (no animal products at all) and the vegans I know piss me off sometimes because 1-they ram itdown your throat 2-tell you what a pos you are for eating decaying carcasses 3-Most of them look like Mr. Burns from The Simpsons. Plus Whey is an animal by-product so no whey for a true vegan.
I realize this is a huge over generalization and some 300 # monster vegan power lifter is going to prove me wrong but I can only go by what I see.
I think if it's for health reasons and you do things in moderation you'll have a lot more options and will get all the micronutrients you might not get with just whey protein. I think you'remaking an assumption that your health is being affected by meat butis it reflected in anything? Like your blood work or something like that?
There are a lot of nutritionists that specialize in working with lifters. The one I used taught me more about what I was doing to sabotage myself then any forum or web page could. It was not expensive and I noticed a huge difference in how I felt and performed.
This is just my .02.