Can I impose upon the experts here for some guidance on which of these trimmers to buy for home use? I mow about 3/4 of an acre of lawn and will be trimming grass around fences and Belgian block plus occasional foot-high grass and non-woody weeds. Will use once a week. Went into a dealer today with an FS-45 in mind, but he talked me out of it saying it wouldn't stand up to my yard. I don't want to go overboard and get something too heavy or too expensive. Thanks for your thoughts.