Hi wazzbat,
I would suggest Japanese, namely echo. Although Japanese equipment is based on the same general design it was 40 years ago its of good quality. I would not recommend anything from Bunning�s. I would not recommend low end still or husky stuff either, as much as the sales man try�s to talk you into it, it is not what it use to be (my favorite mower show has stopped dealing stihl altogether).
I have an industrial echo brush cutter, and can�t fault it. It starts easy, uses no fuel and best of all is so much lighter than Honda or stihl stuff.
as to a mown edge anything is possible with a little practice!
Regards Jay