If you are planning to buy a corn or pellet burner or replace your heating oil or natural gas furnace you should visit this heating cost calculator first at http://www.nhclimateaudit.org/calculators.php
this calculator gives you side by side comparisons to e most common heating fuels and lets you know how to get the most bang for your BTU. You simply enter in the cost of each of the fuels available in your area. (Below is a sample of fuel costs for my area of Wisconsin) and it will let you know the cost of using that fuel. (Below is a screen shot of the calculator)
This chart offers an unbiased "apples to apples" comparison of fuels. It is well worth exploring before you put many thousands of dollars into a furnace or heating fuel change.