For the sake of argument we will keep it to straight shaft trimmers. Searching through the threads I have determined the following trimmers are in employ by various folks. RedMax Stihl Husqavarna (Not Husky) Echo Tanaca The Local LCO Supplier only sells tanaca straight shafts. Echo are available at home depot, Husqavarna's are sold at the ranch supply store, Stihl's are available just about anywhere. I have only seen red max named here, I have not found a local supplier.