Didn't read all the replies. I am convinced that composite is the way to go. Lowes has the right widths.
I'll know for sure in a few months when I lay mine in.
I used 5/4 composite deck boards. They have imitation grain on them which appears relatively realistic. They are 5 1/2" wide which is close to being too narrow for the bedstrips to cover the gaps. I cut short spacers out of the same boards to go between the boards at every bolt hole to keep the boards from shifting which could expose gaps at the bedstrips. It worked like a champ.
