Helper springs or air bags?

If price is no object, air bags would be the best way to go. The problem with air bags, you will need a air compressor, a controller in the cab, (to adjust the bags hight) and the air bags with mounts. Then you have to hook it all up. I removed my bump stops and installed Timbren Suspension System. It took less than a hour to install. The bottom of the timber sits one inch above the axle so it will not change the ride of my truck. Once I load the 5th wheel, my truck squats a little over a inch. It is more stable side to side and no maintenance required.