Ask HN: Best corporation type for web business

We will be launching a website soon where you can generate food nutrition labels online (consider it a digital item). All business will be done online and we are expecting customers from US and Asia.

Does anyone have any opinion of what is the best corporate structure (llc, s-corp, c-corp) and the location to incorporate?

We don't have any grand goals of making bazillion dollars like Facebook, but just to hopefully make a decent amount offering a b2b service. We are currently leaning on starting an LLC in California (where we live).

Opinions?