I need a new trimmer for around $200. I would be willing to spend more if it came with an edging attachment, however. I mow 14 yards weekly, most with no more than 10 minutes of trimming per yard. So it won't be used more than 2 hours or so per week. What would be a good medium-duty trimmer that will last me several years under this kind of load? Preferabally straight-shaft, because trying to edge with my curved shaft Craftsman just isn't working very well. I was looking at the Echo SRM-210, which is priced at $200 and there is a dealer within two miles of me. Would this be a good unit for my operation or is there something better?