It really depends on your usage...
Ag work, R1's are the best choice
In the woods, I'd go with R4 tires since they're more resistant to punctures
My personal work is mowing a field that I'm very familiar with and snow blowing my drive and other paved areas. I like R3 turfs for this work, but I'm considering R14's (if they can be mounted on my rims)
What I'd love is Nokian snow tires because they look so cool...but that's a $4K-$5K proposition and "cool" ain't worth that much!
BTW, R3 tires are much better then R4's in snowy conditions...have had experience with both.
I don't use chains...don't need 'em