Getting more input form other pond managers on this topic will make this thread much more useful. Maybe even make it a candidate for the Archives Section. Choosing a lake/pond manager seems to me very similar to choosing a girlfriend or wife. Which one can you best get along with, one that best suit your needs, is intelligent, thoughtful, considerate and works well within your budget, plus you are content and not aggravated with them at the end of the day.
I had always suspected Bill to be a genius.
This post confirms it.