Well, I like the Tractor Supply catalog, aka The Blue Book.(though you may already get it if shop at TSC) and Northern Tool+equipment. I also get a catalog form All States Ag Parts which is a tractor and combine salvage which sells used parts.(mainly Ag equipment).
I also just got a subscription request from a magazine called Farm Show. I have never seen one before but it looks like it could be interesting. They supposedly publish inventions by farmers and the like from building 600 dollar green houses to converting combines to harvest small trees and talk about the best and worst tractors. I don't know if you would be interested but it peaked my interest.