A little from A, a little from B and some from E
While Market validation is a killer use of kickstarter, it shouldn't be the first validation test you do.
A professional campaign will cost some dollars. Best to get a sense of the market opportunity prior to launching a kickstarter.
Plus, pre crowd-funding validation done right will result in a pile of emails and interested persons to help kickstart your kickstarter.
It's also a great reason to get people talking about your project. Pairing a remark worthy product with a kickstarter campaign can be the story that gets you covered around the internet.