The Stihl MS250 (old model they still sell, even though the MS251 was supposed to replace it) has been great for me. I bought it after we had a bunch of oak trees taken down (I paid to have them dropped, and I cleaned up the mess), and it paid for itself after the first use.
It isn't the most powerful, or the biggest saw but it really doesn't need to be tbh. But it wouldn't play well with a 20" bar. The MS291 is a great compromise, not too big and heavy, but enough power for a 18-20" bar. Stihl has a great file to sharpen chains as well. A hard plastic case is really nice for storage. So by the time you buy a MS291, case oil, bar and chain oil, you are getting close to you budget.
What I did notice is that Stihl starts list a 20" bar in the "mid range" of the bar sizes on the MS391. But if you are just doing storm cleanup, a saw that big would be overkill in the long run!