I've never lived anywhere that didn't have a garbage disposal. It's just second nature to me to throw food waste into the sink. So of course we had to get a garbage disposal.
Because we don't anticipate abnormally heavy use of the disposal, we went with a lower HP model. We chose the InSinkErator Badger 1. Purchased at Home Depot for $90.
Not only are garbage disposals convenient, they are also green, which isn't something everyone immediately thinks of. By using a garbage disposal, you're eliminating waste that would have gone into a dump. They are extremely efficient, using only about 5 kwh of electricity a year and 1 gallon of water a day on average.