Volvo T-Ride Suspension

I am thinking about specing out a Volvo VHD that will be used for pulling a tri-axle end dump.

Most of the hauling will be done on a gravel road that is usually full of potholes and washboards.

Have any of you used a 5 or 3 leaf T-Ride Suspension? What is your opinion on 5 vs. 3 leaf T-Ride, and how would you compare it to using an air-ride suspension?

I am trying to avoid having the truck shook to pieces prematurely. I would rather replace a few air-bags vs. having to constantly replace parts of the truck that can't stand constant shaking.

Also, whats your opinion on T-Ride vs.Chalmers?

Thanks.