CCH has a good overview over the business entities available to the business owner. Be mindful, though, that choice of entity is influenced by your state laws. For example, the overview states that corporations are usually cheaper to form than LLCs. This is not true in New York.
Usual price tag for forming a limited liability company in New York (City): $1300, excluding legal fees.
Usual price tag for forming a business corporation (or s corporation) in New York: $195, excluding legal fees.
**This post is for informational purposes only and does not constitute legal advice**