Golf staff bags are top of the line golf bags like those used by professional golfers. They often have high end finishings like leather construction, a plethora of pockets and storage areas, and large manufacturer logos. They can also be quite heavier than normal stand bags or carry bags. However, if you aren't walking the course and plan to keep your bag strapped to your cart, then the weight won't be as much of a factor.
GlobalGolf.com carries staff bags from some of the top manufacturers in golf, such as a TaylorMade staff bag or a Titleist staff bag.