I use a curved shaft stihl edger to get the edges, and as for the height, i'd say anywhere from 3"-3.5" on this yard. As for the concrete, around here I can't say that there is a lot of attention paid to the concrete work. I've never noticed that before, but now that you mention it, I see what you are talking about.
I'm a Stihl handheld guy, with Toro push mowers, no brand loyalty on bigger mowers. You couldn't pay me to own a Ford or Dodge.
My business provides quality lawn care, but more than that, we offer even higher customer service.