Stihl 310 chainsaw is a firewood workhorse. I would go the smaller size stihl chainsaw if I was just cleaning up my woods and the only reason being is because of the weight of the chainsaw. The smaller you go the lighter they are which means you can carry it all day long without over exerting yourself. Anything bigger than the the stihl 310 is used for felling trees with a noticeable weight increase. Bigger fuel tank , bigger motor, longer blade ect..
"The deerskin rug on our study floor, the buck's head over the fireplace, what are these after all but the keys which have unlocked enchanted doors, and granted us not only health and vigor, but a fresh and fairer vision of existence" -Paul. Brandreth