I think the scope of edging should first be determined. If the beds are in good shape, I mean if they have been edged on a regular basis and still have a good edge on them, then a stick edger will probably work.
If the beds are in good shape, you may need to edge out more material, and may want to think about something heavier. In the spring, I usually go all out and use a edging shovel and cut out a nice deep edge. Also, Im always reshaping the beds here and there (Every year it seems like i'm not happy with the flow/look of the lines) The deep edge looks real sharp then when I put mulch in.
Personally, I think the stick edgers are great for maintaining the edges during the year, but for that first spring one, I prefer to use a edging shovel and/or something a bit more beefier.
A couple of guys by me have those edgers that
mount on the front of your rider mowers. They seem to like them from what I can tell, but they look somewhat limited in use. It may be something to check out though, especially in a commercial application.