[chrismorse]

I've done a few decks over the years and have a few suggestions:
1) Stagger your end joints, AND add an additional joist at the joints. so that two boards don't land on one joist, (which requires screws or nails very close to the end of the boards, which encourages splitting at the ends and moisture intrusion/rot. So install two joists, about 3-4 inches apart at the ends. This also helps the life of the PT framing.
2) Textured decking is particularly important, where the deck is on the north side, or heavily shaded, which might allow moisture to stand and encourage moss/mildew to form - making things dangerously slippery. Surfaced wood can be treacherous when wet.
3) I think the concealed fastening systems are worth a serious consideration, for appearance and ease of installation. some of the surface installed screws can strip out the heads, making installation and or removal difficult.
4) The later version of TREX, with the improved surface layer seems to be fine on 16 inch joist spacing, compared to the old version, significantly more colorfast, textured and stronger.

chris