Follow WireSix's advice. To incorporate, or in some cases not to, really depends on the state you plan on incorporating in. There benefits to LLC vs S Corp may vary, and in some cases you may not even have any benefits incporating at all depending on how you intend to setup your business.
The point of a account or consultant is to determine those and advise the best route for your needs.
I'd recommend legalzoom. They did our incorporation in Wyoming and 2 trademark registrations for a pretty low price. Less than $1000 and that included all the government fees. They won't make any recommendation of the type you should get though, you need to know that in advance.