Have you checked out my threads here, and in the DIY forum? They go fairly in depth on the construction/filtration of the tank. You can use the search button at the bottom of my posts to find them. Also, check out the site I have on MSN. It has tons of pics, and you can access it by clicking the www button at the bottom of my posts.
By not including the water, I assume you mean not including things like, RO/DI, salt, dry sand, LS, and LR. So to build just the tank, it cost roughly $2,500. That's not including any filtration, lights, etc.
For filtration, I've got LS, a large sump running bio media, activated carbon, and mechanical filtration pads. There is also a 6' tall 8" dia skimmer, 2 80w UV's, 2 fluidized bed filters, and a canister filter. Circulation is provided by 2 5000gph pumps. One on a closed loop, and the other open.
Let me know if you plan to build one. I'll try to help in any way I can.