The brand is not as important as a few features. Keep in mind that "cheap" fans end up being expensive for 2 reasons. First, the fan will break faster and you will need to replace it. Second, the electrical usage of some cheap fans is so extreme that they can cost you $10 - $20 per month to run.
The main features I look for in a fan are quietness, a sturdy base, and some form of tilting. It is also great to have a strong plug because the plug is the most common failure point in a typical fan.