Save your money and don't get a treadmill with Crosswalk arms. They are essentially useless.
A cross walker at $600 from Gold's Gym is an avoidable expense as you won't get anything as far as quality and durability is concerned. It is very low in power and performance, and for shelling out $200 extra you will get much better models that promise longevity and a better warranty. You are better off going to one of the warehouse clubs and getting one of their low-end treadmills than spending $600 on a Crosswalk unit.