I've been using a Ram-mount laptop stand in my hi-way trucks for more than 6 years, (same mount 4 diff. trucks).
Ram-mount can not be beat in my opinion! (life time warrenty on all there stuff) I also use their radar detector mount, camera mounts, universal cellphone cradles, suction cup mounts, etc, etc.
The really cool thing is all their stuff is interchangeable as long as the ball size matches.
Go to their site and check out the vibration/shake test videos .