I had airbags in a truck once...Most annoying things ever. One side kept releasing...I ended up throwing in an extra spring and putting up with the harder rear...When towing it was awesome, just a little stiff with no load. I don't think I'd have bags again.

I'm just about to do a GVM upgrade on my Landcruiser...200kg rear and a 2 inch lift...Should be good...When the parts arrive.