Texas Hunter Feeders get recommended a lot around PB, but the money is for serious pond meisters.
If you are feeding a small population of fish or can fill the feeder more often...I made one from an affordable deer feeder that worked very well last year for the fish and has done it's job for winter feeding of the deer for the last few years. I have no complaints other than the lid is a bit difficult to put on and off with gloves on. I think the coon-proof aspect is mostly in the hanging apparatus, but the feeder has not been broke into yet.
Here is a thread that shows the feeder in detail...
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Main=37369&Number=488179#Post488179On sale for 40$ a few years ago and some pond-side engineering...
