I've only had great luck with Husquavarna. My Stihl won't hold an idle since new. The shop where I bought it couldn't help and blamed it on the emission controls. Stick to the equipment dealers that specialize in chain saws, where tree professionals might go. The size is dependent on what weight you are comfortable working with. I'm older, so lightweight is what I need. My Husky 345 e-series with a 16" bar will cut anything I want to cut, even it takes me a little longer than someone who has a bigger saw. Watch a bunch of YouTube videos on how to safely fell a tree. I've done a lot of cutting and I still learn more from watching these videos.
Kind of similar, Really like any of the 340,346, 350,353 saws.
Inherited dad's 2001 closed port Husky 350 and used it a couple years, but it developed a lean condition because of a leak between the clamshell haves.
Fixed the leak. Put a flat top meteor piston in, reduced the squish, muffler modded it and advanced the timing a couple degrees. With a an 18 inch bar and full chisel It cuts really quick and is light.
I liked it so well bought another runner Husky 350 off ebay an (open port) version, that had a fuel leak- fixed that, reduced the squish, muffler mod and modified an 8 tooth stihl drive hub to replace the stock 7 tooth.
Put a 16 inch bar, full chisel chain on it and it is a real gem to use on smaller stuff because of the higher chain speed. Going to get one of the super light bars for it to.
Get my son to help buck up firewood and with 2 saws things go quick.
Clamshell husky saws may not be all metal but being plastic they are light. For the bigger stuff I also have dads McCulloch Promac 700 and other than being Loud and having more vibration it really works well.
Figured that covered most bases but wanted a Big saw for any real large diameter trees I might need to cut.
For fun I bought a Stihl 660 Clone kit and am getting ready to play "build a saw".
Can't wait to have a large cc saw.
All that said the 350 Husky's will probably continue to be my go to saws.
Then again is there such a thing as having "to many" good running saws?