This website offers a wide range of information on this topic, including a comparison of different insurance offerings by state, as well as in-depth articles on how to choose a plan and what changes you should expect in the era of health reform.
The best way to determine your price range is to look at five or six other speakers who are talking about a similar topic, and are on just about the same level as you, and then simply figure out a price that is about 85% of the average.