I bought a new Stihl HL 100 K this morning before starting my first large commercial job. Ran it for 2 1/2 hours this morning. Articulating head is AWESOME. Only thing is the weight. I don't know how the other brands are. I've heard pretty bad reviews about the articulating head units of other brands. However, it is balanced extremely well. There were some hedges along a wall. Tops were about 10-12 feet above where I was standing. Turned the head 90 degrees and went right along. Really amazing how this thing works. Went through almost three tanks of gas. So for anyone looking for one as I was last week, the Stihl HL 100 K is the one you need.