Being a DJ is about more than simply knowing when to play what song. You've also got to show the crowd a great time, inviting them to dance and dazzling them with superb lighting displays and other giveaways such as glow sticks.
While you might rely on a major brand for such items as speakers and turntables, Pro has you covered for the visuals. In addition to a lineup of reliable and inexpensive speaker stands, Pro makes a quality hazer and even sells glow sticks.
There's no reason to spend too much on these extras, but missing out on them would certainly be a mistake. When you buy from Pro, you get good stuff without the brand name prices.