Keep in mind that quality fans are not noisy. Usually if the ball bearings are permanently sealed the noise will be eliminated. Another recommendation is to look at the blade pitch. Lesser quality fans will have a blade pitch of 12. To maximize fan efficiency, the blade pitch should be between 12 and 14.
Some manufacturers compromise on blade pitch by using cheap materials.
You will notice that a lot of companies use particleboard or even printer paper for constructing the blades. Wood blades will warp and lead to noise and wobble over time. Some companies, like Casablanca, use multi-layer hardwood veneer or painted blade finish. The multi-layer hardwood provides sold performance, while the veneer ensures beauty for the fan. Standard industry ratings that determine the performance of fans do not exist.