Great idea - I was thinking of a hand held job, but decided to go full boar:

http://www.sears.com/craftsman-140cc-gas-powered-edger/p-07176266000P?sid=IDx01192011x000001&gclid=EAIaIQobChMI9cCr-dGW1gIVi7bACh3k1w_3EAQYASABEgJoi_D_BwE&gclsrc=aw.ds&dclid=CPy29_3RltYCFYpnfgodusgDrg

I do have an electric weed-eater though, will that score me points with the Green police ?