Speaking as both an entrepreneur and a lawyer, I ampleasantly surprised by the number of comments that recommend an LLC! I was expecting all the usual "you have to be a DE c-corp." comments. As some have suggested, an LLC is easier to form and manage (no requirements for annual shareholder meeting with minutes, regular board meetings with minutes, etc.), and you have more flexibility in having varying rights for voting, profit sharing, etc.
It is true that at some point you may need to convert to a c-corp (an S corp is just a c corp with a special tax election for federal tax purposes), but that is easy to do when it becomes necessary. At that point, you can also decide if there is any justification for incorporating in DE (in reality, there rarely is), but you may as well put that decision off until you need to make it. Just form the LLC and start building your business without worrying about observing all the formalities of a c-corp.
Also, note that when it does come time to convert to a c-corp, the S corp election question is something that your CPA will guide you on, because it depends on your corporate and personal financial situation, and how you want to be taxed.