I like you and millions of others have places that you can't get to on a rider so we need either a good line trimmer or a walk-behind mower. I have all three and each has to be used where they work best. I try to eliminate as much as possible the line trimmer areas. I use round-up sprayed along the fence line and around the house, trees, outbuildings, ect. don't need to use it for a few months.
The first thing to remember s when your deciding on which mower but yery important Which DEALER. Buy it from a local dealer not Lowes or H.D. as they won't give you any service on your mower.