It obviously takes longer to lay a solid wood as opposed to plywood roof deck - but this picture shows why it's worth it.
I decided to go with straight 2x6's as opposed to tongue-and-groove roof deck. The cost is significantly lower, but it takes a bit more planning and work. The look is slightly more rustic than T&G, and fits in well with the changes we are going to make to the exterior of the house.
The picture above shows the block bases I built around the posts. These are about 2 1/2 feet high. I used brick to bring them up to the right height, and make a solid base to mud the caps to.
Here is one of the posts with the stone applied. I did the same general pattern as I did on the fire pit, so it would all tie together. I plan on capping these off with 2" thick tumbled pavers to make a flat surface for drinks, etc.
Once the caps are on, I will build out the posts to about 8x8 to give them the right proportions.