There all good models and will work well. Just don't be mislead by Echo's advertised features and spec's..If you compare the housing cfm between the Echo 770 and the Stihl 600 cfm rating at there housing the Stihl is 1012 cfm compared to the echo"s 765 cfm. The Stihl BR 600 Magnum is a lot more blower for the same money $499.95 The Stihl is 712 cfm with the tube, with a 201 mph air velocity. If you want to run a fair comparison for the Echo 770t you'll have to look at the BR 430, it has the same 765 cfm at the housing as the 770t and it is 500cfm with the tube and runs 183 mph