I am going to buy this stuff:
http://www.superdeck.com/
Be sure to look at all the pages on their website. There is tons of info.
From what I heard it is the best.
I called the company and found out i have 3 lumber yards near by and they said most ACE hardware stores can get it.
They had good & friendly customer service and i bomb-barded him w/ lots of questions.
~Hoffmans