Couple of notes:
1. There are probably tax benefits for incorporating in Delaware over either of the other two, although you will need to pay a registered agent fee and a fee to qualify as a foreign corporation in other states, in that case (overall, depending on the expected size of your startup, the tax benefits should outweigh the fees).
2. If you want a VC to invest in your business, you almost certainly want to form a corporation, rather than a LLC. Although it is slightly more work (only slightly), an S-Corp has almost all of the benefits of a LLC. Although VCs will ultimately force you to switch to a C-Corp (because they will take preferred shares, which are not permitted by S-Corp rules), this is a simple and painless process. (VCs will probably also make you incorporate in Delaware if you do not originally do that).
Although I am a licensed attorney, please do not interpret any of the above as legal advice or assume a client-attorney relationship has been created. You should consult a local attorney and have a more detailed discussion, rather than relying on these notes.