Sarcasm aside, Trex is your better option. It cost a bit more in the short run but you will save in the long run. I'll send you a picture of a ramp made with trex.
I was wondering about that stuff. I've thought about using it, but I don't know anyone who's used it in this area. With all the rain we get I'm concerned about it getting slick as snot during our mild wet winters.