Echo 4910 is a great medium sized saw with plenty of power. Doesn't feel much heavier than the 310,325,3510 series. Was a steal at $289 when I bought mine last year but look to be around $350 now.
In 40 years of homeowner/farm use, I have never needed to take a saw to a shop for service. Redmax (pre-Husqvarna) Echo and even a few Craftsman picked up for free at garage sales. Only issues have been replacing fuel lines after 30 years and worn bars/sprockets.
