I usually don't do alot of heavy trimming but here lately I have a large ditch that is putting my FS 80 to the test. I can do it but its a little weaker than I would like for the heavy weeds and grass. How much improvement could I expect with a move to a FS 110, FS130 or the FS250? I would like to use a brush blade every now and then. I stick with Stihl product because thats all that I can get serviced around here. Redmax would be a 40 mile drive. Any input welcome. I've never used a larger trimmer but weight would have some input on my decision. Thanks!