Saws run about forever with proper care and proper fuel and oil ratio's. Me, I prefer canned fuel but then I don't run them everyday either. My 45+ year old 028 runs just fine but it needs the isolastic rubbers replaced which I just ordered and will install. Rubber does deteriorate after so many years, like fuel and impulse lines do (did those last year).
I like having at least 2 saws on the ready in case I do something stupid and need to cut a stuck saw out of a pinch.
If I were you, I'd get an Echo and keep what you have. Echo's are quality, Japanese designed saws, I have 2 myself and I'll never buy another overpriced Stihl.
I don't consider any medium size saw to be a major purchase, nit like an overpriced car or truck.
Whatever you get, buy an extra loop so when the one on the saw gets dull you can change it out and keep cutting and learn how to PROPERLY dress a dull loop and set the rakers as well.
There is nothing worse than pushing a dull loop and it's hard on the powerhead as well.