+ 1 for 50 cc Stihl - I have Stihl MS260 with a 16" bar. It's a great saw, and use MS261 at work, which I like even more.
That said more often now my go-to saw seems to be my MS462.
I've used Husqvarna (Jonsered) too. Both Husqvarna & Stihl are well balanced, good ergonomics, features, with good power:weight.
If I were using saw frequently, I'd opt for a pro model.
The Stihl MS201 is purportedly a good ground, limbing saw, but it's pricey.
A colleague is very happy with his 40cc class Shindaiwa that he uses for his side tree jobs.
Some arborists are using MS251 Woodboss (homeowner grade) as a ground/ utility saw for quick cutting and limbing around chipper.
If you are able, use a few saws first to determine what feels comfortable. So much is personal preference.
Buy for your anticipated typical (~85% of use) cutting needs. For MS260 I like to run a short (16") bar, even though it will take up 20" with 18" running well.
If I were cutting small wood for occasional use, I'd also consider battery saws, especially if I already owned another piece of equipment that used the same battery.