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.