ok here is what i found on why i would choose an llc or corporation verses a dba.
all information is copied from here. these are not my own words.
WHAT IS A DBA
A dba is just a certificate you are legally required to file. It helps you open a bank account and be legal but it does not protect your personal assets
because the business entity is still a sole owner. A sole owner is liable for all civil or financial liability that the business incurs.
WHAT IS A CORPORATION OR LLC
A corporation or LLC is a separate and distinct business entity - separate from its shareholders / owners. Thus, a shareholder's / owner's assets, such as a home, personal bank account, or automobile, are not at stake if the corporation is sued and a court judgment is entered against it for civil or financial liability.
Only the corporate assets are at state. If the corporation has one computer and $1,000 in a corporate bank account, that is all that can be seized. If you file a dba and you are sued, you are liable for all business liability.
Should you file a dba, Incorporate, or Form an LLC
In general, if you are one person, and have a lot of personal assets, incorporate or form an llc. You will be protected. If you don't have a lot of assets ( such as a home and an expensive car ), you may want to just file a dba to start. A corporation, depending on the state you want to incorporate, or form an LLC, may cost $100 to $200 more than a dba but it protects your personal assets. A dba does not protect you. If you file a corporation or an LLC, you don't need a dba.
Note: If you incorporate, the default type of incorporation is a "C" corporation. Then, you can change it to an "S". So, just go ahead and incorporate or file an LLC, you don't have to worry a lot about the type of corporation or LLC.
goto the link for the rest of the info.
in my personal opinion. i'd rather spend the extra money for an llc so if i ever were sued. they couldnt touch my personal assets. just the business assets.