I picked up a nice used MS170 a couple years ago. The thing was bought after an ice storm and used for about 4 hours. Then it sat in the guys garage for 3-4 years. He needed some money so i bought it. It has been nice for cleaning up tops and limbing up stuff on the ground. Nice and light. Those are nice little saws.
The only other chainsaw I have is an Echo arborist model. That one is designed to be used with one hand. Tiny thing. I should probably just unload that one. I don't think I have ever used it. Then again, it was another one of those "I need some money" deals. For $25 if I use the thing on one job it will have paid for itself. Then again, that was several years ago.
I would guess I probably use the MS170 and Husky 55 quite a bit and the MS361 tackles the majority of all big stuff unless there are a couple of us sawing. Crazy to think about how this stuff accumulates over the years. Then again, 15 years of self employment, we heat our home exclusively with fire wood, and I have been fortunate in some of the "no brainer" purchases. Easy to see them add up. I won the Husqvarna in a 3 tickets/$10 raffle. That puts me at 5 chainsaws for around $800-900 accumulated over 15 years. Not too shabby.