devoman
what model hitch do you currently have and
what is the rating on the hitch?
while the vdub has an air suspension...you certainly can use w/d bars...and i think you should be....just not over 800lb bars.
inland andy here, suggests not using w/d bars with air bags.....
and he may be correct in some situations....
but your vw doesn't have simple add/on airbags....
and the suspension is approved for use with w/d bars.....
using
w/d bars will put 2-300lbs back onto the front wheels and that would greatly improve towing, handling and stress on the suspension.
really this is all speculation....
unless you take the trailer/tv to a scale for some real numbers.....
but if your hitch weight is over 500lbs....and approaching 700lbs
using the w/d bars to reload the front wheels is useful for safety....
and helps with sway control, braking, and most handling issues....
now if you really do plan to buy a new hitch....
you really should consider the hensley....yes i use one....
the t rex has a short rear over hang....and thats good for towing because the rear axle has less leverage on it from the trailer....but using a hensley hitch moves the trailer pivot point forward nearly 4 feet....so your touareg towing point would move way forward....almost in front of the rear axle....so it takes on some of the handling traits of a 5th wheel....and that's a good thing.
i know the hensley is expensive....but it is really worth it for someone with a shorter wheelbase t.v.....
as for the armada....it has 10-12 inch longer wheel base than the vdub....and that's a good thing.....but the tow rating is actually about THE SAME as the touareg.......
the key number to look for on either vehicle is the gcwr (gross combined weight rating).....that is the max weight for EVERYTHING (tv, fluids, people, cargo, accessories, hitch, trailer, lpg, water, cargo....)
for the vw it is ~14000....i think.....7700 for trailer and 6500? for t.v.
for the armada it is 14800....so only a little higher....and depending on the model/add ons the armada itself weights more than the vw....
the tow rating for the armada (9100) goes DOWN as it is loaded with people, fuel, gear) while the
vw rating doesn't change.....as it is loaded... so the actual towing capacity is about the same.....once the armada has stuff in it....does that make sense?
again the armada has a longer wheel base....which is good,
but vw is coming out with a model that is 10-12 inches longer soon.....
most here will suggest you should look for a beefier t.v. than either the vw or nissan....
and i have a sd ford diesel....and love it for towing,
like twink suggests... big truck is good.
but i suspect you have no interest in gm, ford, or dodge...

so you might want to look at the 2007 toyota tundra which will have a true towing rating of 10,000lbs.
cheers
2air'