Without turning this into a "this one is better than that one" thread, I'd appreciate some advice on stick edgers. I've operated for years without one, but recently picked up some new properties with lots of sidewalks and figure a dedicated stick edger is the way to go. My current equipment is Echo and Stihl. I like both a lot. They both have stick edger models that have curved shafts at the end which I guess means flexable shafts, although Stihl makes a straight shaft model also. Do I stick with a straight shaft model? Any advice is appreciated.