I've got an MS310 with the 20" bar...just one short step up. It's a great saw, but heavy when you're running it all day and total overkill for the OP.
What I love is I can let it sit for a year and it will start within 2-3 pulls every time.
We've had some challenges. We think it was a backyard breeder that dumped them and they had 0 socialization until we got them. As a result, he was terrified of everything. For the first 3 days we had him, we couldn't get near him. It took a ton of work (took us 6 months to get him to use...
He's all Akita, the third one I've had. They found him and two of his siblings running the streets of Detroit at about 5 month of age. They were very malnourished and had alot of joint problems from being caged is our best guess. We didnt know if he was going to make it as it was touch and go...