Have you checked out RocketHub.com?
"We are the creative underdogs. RocketHub is a community for Creatives by Creatives. We are a purely indie outfit, not backed by any venture or corporate money. RocketHub is accountable to you, not bankers or the old guard."
My suggestion is that you reach out to all three sites and talk with the folks who run them. Figure out who you like and who you trust. Crowdfunding is a relatively new space, and there is a formula for success. Talk with folks who have done is successfully. Collaborate with the people, not the platform.
