Tonneau Cover for Toyota Tundra

I have a 2008 Toyota Tundra with the Max cab. I want to buy a hard tonneau and have two questions: Which material (i.e.,aluminum, fibreglass) is better? Does any other owner have a brand they recommend? The on line information I’ve read is confusing

Plastic is best. Fiberglass just looks better sometimes. Places that sell bed liners or spray on bed liners usually sell the same things as the internet or JC Whitney.