You did not say what year Airstream. That can make a huge difference as to the weight of the trailer. Personally I would go with the Andersen with that size trailer. You will need very little weight distribution but definetly some anti sway control will be required that the Andersen can safely provide.
WBCCI 10656 Southeastern Camping Unit
Associate European Unit
2006 Safari LS 23 ft
Formerly 1964 Bambi II
"I got a fever and the only prescription is more cowbell"