Start it as an LLC. You'll make the Subchapter S adoption for the IRS. It used to be that VC's would not fund an LLC, but that is not the case anymore.
You can change your LLC into a C-Corp any time, or you can form an LLC and have it acquire the LLC for tracking purposes if your VC wants a c-corp.
LLC's pay taxes as an S-Corp, which means all the income and expenses pass through to you, the owner, and taxes get paid on the profit based on your personal tax rate.