Ultimate Marine Aquariums by Michael Paletta shows some nice equipment setups for larger systems, but doesn't detail much of how they work.
My personal favorite for it's section on equipment is Anthony Calfo's Book of Coral Propagation. Alot of the book focuses on corals and coral farming, but the first 200 pages or so are dedicated to describing equipment for larger systems. Plus, Calfo writes in a casual and entertaining style.