We do alot of shrub and hedge trimming all year long and we use several different trimmers. Echo's HC-150 is a decent, reliable light duty trimmer although a bit underpowered for anything other than basic trimming. Efco trimmers are our primary trimmers, they are heavy but also have large engines and heavy duty bars and will cut up to 3/4 inch branches with ease, best trimmers out there. We also have SCH-265 25cc extended reach trimmers that see alot of use. If your going to do shrubs your going to get all kinds of calls from people. Shrubs that are trimmed twice a year, once a year and some that haven't been trimmed in years. Most if not all the trimmers you listed have 21cc engines, a good engine but weak. We are going to be ordering Tanaka's HTD-2530s 30" bar and 24cc engine to replace our mid range trimmers, you need power to cut back and resize shrubs and that little 21cc engine just won't cut it.