Let's be clear; if you need a Tom Tom arm for a rack system, you need it to be an attractive, short pipe, and secure ball socket design.
I think this model is the best choice for that, and the best model out of what Gibraltar makes too, for only a little more cost. Paired with a GCS-400C series rack system - where almost everything is chrome, this Tom Tom arm paints a picture of elegance.
Obviously everything mechanical with it is top notch, as you would expect from Gibraltar.