My Echo which I bought over 25 years ago recently bit the dust. Needed a new coil and a few other parts which would have cost about $100 so I decide to treat my self to a new one. I maintain about an acre plus two rental houses. I purchased a Stihl professional model with a 4 stroke engine. After using it for a few months I have to say I prefer a 2 stroke. My old one was quieter, lighter, and seemed to run better (in it's earlier days). The Stihl I have is quite powerful and the model I have was made in USA.
Whatever you get I highly recommend using the non ethanol premix fuel like Trufuel. All the manufactures sell their own premix fuel. I have been using this for a number of years now in my line trimmer, hedge trimmer, blower and chainsaw and have not had any fuel related issues. I really believe that my 2 stroke equipment starts easier and runs better using this fuel. I haven't had to breakout the starting fluid since I started using this stuff. I also always use fuel stabilizer in my fuel for the mowers and tiller.
A small engine mechanic once told me that fuel stabilizer would prevent half of the homeowner issues they deal with.