Don't get carried away. The echo is in no way, shape, or form a proper pro saw. It handles like a cinder block, its air filtration is marginal and the filter gets filthy fast, it needs the limiters pulled so it can be properly tuned, the muffler needs a little mod, it is a finicky thing to tune at times, the antivibe is average, and it has no top end. I have an original edition ms362 and an echo cs590 and an oe 262xp in the 60cc class. At this point I rarely run the echo.
That being said, the echo is probably the best "farm" saw out there. Oh, and by the way, Echo by their own admission calls their 590 a farm saw. The 620 is a mild upgrade, as I understand it...