I ran a Linex bedliner for 8 years without issues but my Linex was fairly rough compared to some. With the DRW, I was worried about every lb, so I added a rubber bed mat, and that's good for the fiver hardware I have in the bed from the previous owner.
If you are going to do only one, I'd do the rubber bed mat.
'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 DS, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Bags, Toyo M655 Gs, Curt front hitch, Energy Suspension bump stops.
NRA Life Member, CCA Life Member