Another thing you can check is to make sure your wheels are balanced and properly inflated. This way you can see if there are any dents in the rim which can cause vibrations. Plus its the least expensive check.
You should check your tie rods as well. With the car jacked up see if there is any side to side play in the wheel.
Control arms and bushings should be replaced every two years if you drive your car hard as good maintenance practice. This will give you new bushings and ball joints. They will last longer however if you talk or check turner's website they recommed replacing them every two years.
Mine will be due this spring I will probably replace them over the winter.