Heres some thought for you also. The more pond edge you have the more to maintain. I weed eat out as far as I can reach. Myself I like the look of different features along the edges. Heres my pond.
[Linked Image from forums.pondboss.com]


The people who say I can't do it can just sit the @^#% down and watch me. Friends call me Rusto I also subscribe to pond boss mag. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=504716#Post504716