We have Rhino Liner on the floors and half way up the walls on our vans at work. We have not had a problem with it at all.
I had a work truck once that had Rhino Liner in the bed. Sometimes when you would slide something into the bed with an edge on it you would get a cut or chip out of it from time to time.
I know someone with Line-x in their truck and it does seem to be a harder product than Rhino Liner. It looks like a smoother finish also.
Ed, did you ever look into the do it yourself kits? I have seen Jeep tubs done with the Herculiner kit and it looks real good and seems to be as rugged as Rhino Liner. A tub would cost about $200.00 to do at home. I do not know how much a Jeep tub would cost but our last van we had done was $1300.00 .
Chris