LLC Vs. S-Corp
Typically speaking, an LLC is more flexible and easier to maintain, however, in New York state, registering an LLC can be expensive due to the state requirement for newspaper publications (though we do have a way of saving a large amount of money on those publications).
We have a research article titled 'Choosing Business Entity' which you may find helpful. Also, we have another article titled 'LLC vs. Corporation', which offers a side-by-side comparison between the different entity types.
When possible, it is never a bad idea to consult with an accountant/CPA licensed in New York State regarding the different entity types and their tax implications.