I thought I would mention a few points.
Rhino dealers may have both low pressure (Tuff Stuff) and high pressure (Tuff Grip and Hardline). The high pressure products are WAY superior. LINE-X is only high pressure. LINE-X's product has a 33% higher tear strength than Rhino Tuff Grip and Hardline and LINE-X has more than double the tear strength of Tuff Stuff.
You might want to also consider fading. LINE-X has an optional product called Xtra (that goes with the bedliner product) that won't fade, remains glossy, and is fortified with DuPont Kevlar. It's a one-time application with no maintenance. Rhino can give you Rhino Shine which comes in a bottle and must be reapplied occasionally.
A LINE-X blast resistant product has been applied to portions of the U.S. Pentagon and a LINE-X anti-spalling product is currently being applied to MRAP vehicles. (read about it here: http://www.paxcon.com/user_pages/px_...ubpage=PX-2100