I built two decks in the last three years; used a product called EVERGRAIN. It looks great after a couple of years. No cupping, warping, cracking, etc. Maintenance -free, just hose it off. Installs with special torx composite screws, I pre-drilled (snapped lines to satisfy my AR tendencies) and used an 18v impact driver, but a drill would probably work OK. My wife loves it because she can walk on it barefoot without fear of splinters. It has a nice woodgrain texture, and doesn't look like it is made out of [-]sawdust and old milk jugs[/-] recycled materials like trex. Cost was around $2.50/lin ft for 1x6 material. It was a bit cheaper than Trex and a lot better looking- my biggest peeve with many of the composite deck products is that they are hollow and don't look good unless the ends are capped- this stuff is solid, and the color goes all the way through.
I used the 1" nominal thickness at 16" OC It was a breeze to work with; cuts and planes like butter.
It comes in 16' and 20' lengths, so you can avoid a lot of seams on smaller projects.
On my projects, I also used it for the rail caps, but not the balusters or rails. No cuppping or warping like wood top rail caps. I used 4x4's for the rails, 8x8's for the posts and 3/4" painted rebar for the balusters.
The only drawback is that it is heavy, and very flexible until you get it installed. Carrying a 20' piece is like wrestling a 50-lb wet noodle.
Will send you photos by pm if you are interested.