Humana offers amazing premiums for a large number of different plans they have. The downside is that Humana is available only in 22 states, mostly midwest, west, and southern parts of the US.
A sample premium rate made by http://www.toptenreviews.com/ showed that Humana plans are $100-300 cheaper than their competitors, on average (for the cases they explored, so it is by no means a guarantee). Humana offers home healthcare, dental, and vision insurance in some of their plans, and they also have special plans for seniors.
In short, if you live in one of the states that are covered by Humana health insurance, or have a nationwide PPO plan, be sure to check out what Humana offers.