I have an Echo CS-490 which I loathe.  It's a pain to start, finicky as all get-out, and guaranteed to leave me with weeks of rotator cuff pain.
It was the echo that drove me to try out a Milwaukee battery powered chain saw, which works well from a power perspective but gets pinched too easily, derailing the chain.
I'm not sure what I'd buy for gas powered if I was replacing this odd duo above.  If money is no object, get a Stihl.  If you're less loyal to brand and more loyal to your wallet I'm not sure what to suggest  I shy away from Husqvarna equipment because of the repeated customer feedback they get when they fail to honor waranty's, but hey, you can't believe everything you believe on the web.  I will not buy another echo.
I've always liked how easy my Honda equipment starts, my brush cutter is always a one pull start.  Don't think they make chain saws though.
Good luck, curious what you get and how you like it.