Thanks for the responses. I went with 5/4" X 6" all 16' foot lengths. As the deck is not that big (26 boards in total) I am about 1/2 way done getting the boards down. Today's festivities were called on account of rain (been happening a lot here lately in the mid-atlantic). Other than face screwing the first board, I used Ipe clips, using a 5/32" gap. The wood was on-site for 5 days before installation. Before that, it was in a warehouse local to me for about 5 days before it was finally delivered.
I am wondering if I should face screw and plug every other joist (the deck was built 12" on center). To this point, every joist has a clip. Pictures of the work in progress are attached. Not sure why the pictures are sideways.
Thanks again for all comments.
Mike