Although well-intentioned, it seems that almost all the backers are in complete agreement here that there should be no "exclusive" DLC. That sort of mainstream publishing garbage is exactly what we're all looking to avoid with crowdfunded projects. There may be numerorus reasons why someone couldn't or wouldn't go in on the Kickstarter but will buy the game when its released, and their money is just as good as anyone elses. So please, no exclusive DLC.
"The horse I bet on was so slow, the jockey kept a diary of the trip." - Henny Youngman