I checked - I have the MS251 and can only recommend it. The homeowner line is plenty for your planned use. We are all gearheads and like to over-spec things, so that's understandable. But I have done equivalent amount of work of what you need to do with my 251. The Stihl saws come with a 1 year warranty, so go run the crap out of it and see if you can break it!
G