When you operate under an LLC it also locks in your company name to be yours and only yours, if you do a DBA then your name could be potentially be taken by someone who files for the same name but with the llc at the end. The name I chose for my company was already in use here in idaho but it was available in an llc so i took it. An llc is beneficial for larger companies for a few different reasons, one thing to think about is that you can list your members or managers in the public records and keep your name out of it for private reasons. You don't need to pay 1000 for the paperwork, google Registered agents in your area and get it set up for a couple hundred and usually for a hundred more you can get your legal statement.