If you dont have many bears Id go with the tripod package with a timed feeder. To suspend a full 55gal feeder in the air is a bitch!! On a tripod its much easier to fill but some people have problems with bears knocking them over. I have had a few on tripods and the bears didnt bother em.
I would always go with the timed version because it will last longer and it will keep some from going nocturnal. One feeding in the morning is what I use to do or if all you do is hunt evening I do one mid afternoon.
I use to go through 300lbs of corn a week without the timer down in the pines...the deer would just camp there and eat it all in no time. That was to expensive and they never came around during the day b/c they didnt need to.