Are you set on a 24" bar? I have dropped a ton of trees over the years and there are very few you can't handle with a 14" bar.
They are lighter, faster to handle, and wont wear you out as fast. I can limb out a tree and chop it up twice as fast with a 14" bar than a 24" bar...just my two cents.
I have Stihl MS 180C that I have had for 18 years...it is on it's third bar and at LEAST the twelfth chain and still fires first pull....buy a stihl whatever you get.
I've talked to several people who cut trees for a living and they all say the same thing.
Use the SMALLEST chainsaw you can find that will get the job done.
Like I said up post, I've got a good bit of woods to cut, but rarely find anything my 16" Stihl won't handle.