I have 3 Sthil chainsaws and bought 3 Echo's . Seldom do I touch a Sthil. Today I dropped a 20 inch back leaner and used my Echo 490 for felling, limbing, and Bucking. A few weeks ago I put my biggest bar on the Echo 590 and felled a 48 inch sweet gum. I used the Sthil 029 for bucking most of it but limbed with the Echo 490. In my opinion the two saws most important own are Echo 590/490. The Sthil 026 is a great little saw but I can't see any real difference in those two saws. I'd recommend Echo 590/490 to my brother. In fact I did. He has the Echo 620p and in my mind he just paid more for what he could have had in the 590. His saw isn't doing anything my 590 can't do. But, he uses his saw only a few times a year. Now, IF, I were not 70 years old just maybe I'd want a bigger, big saw. Recently passed on a Sthil 056. Good buy but not for me. I love my Echo's. The cs 310 is simply to small for me. It never gets used. The 490 does everything the 310 can do and does it much faster. Biggest waste of money buying a cs310. Good luck.