[jdieck]

IMO you need to look for what will fit your aquascape and sometimes a combo will be needed. You can get Marshall with lots of holes combined with some fidji (rounded and heavy) wich is good and strong for the lower portions, Tonga Plates are excellent for building cave roofs and Tonga branches are good for top arrangments.
You also need to consider when making the arrangment that although clifs, caves, laggons and branching tops looks stunning they leave little flat areas for coral locations but you can always fit the corals on the vertical walls and they will grow toward the top suplementing the araangment. In this case less corals are more and the tank will look more open, cleaner, and the critters will develop better than if you try to crowd it up. Keep in mind that frags do not stay frags forever and for the most outstanding and natural look you may want to avoid chopping them too often.