What kind of company should I set up?

I am going to be starting a vending company and want to know how to limit my personal liability to just the ets of the business. These are going to be interactive vending machines, ie. Mage chairs, breathalyzers, etc. Any advice would be appreciated. I will be in business with my father so I know I do not want a sole proprietorship. Should it be a partnership or LLC? Maybe there are other options?