I've got to add my experience here -- I see I beat Alan in Little Washington for a change!
Josh, I recommend using 6" PVC Sewer & Drain pipe (ASTM D2729) for all of your runs with a cyclone. Do not use snaploc metal pipe from Lowe's or HD because it is too light weight and will collapse. You should be able to find the bell-end white S&D pipe at John Deere Farm Supply places or Ferguson's Plumbing Supply. I bought mine at a plumbing supplier in Spartanburg, SC 18 months ago for $15.95/10' length. Lowe's usually has 6" PVC S&D fittings (you'll need 45's, 6x6x6 and 6x6x4 wyes and straight couplings). Do not buy the tight 90's or 6x6x6 Tees as they have too much drag (use a short section of straight pipe between two 45's if you need to make a 90). The beauty of PVC is that it is light weight, very durable and no glue or screws are needed (you will change it before you perfect your layout). I've used 4" on my smaller DC for years and never had any real static problem. If you think you will, just use metal HVAC duct tape along the pipe sections and attach ground wires to them with a sheet metal screw (I think it is unnecessary).
If you need to make special connections, check out Stan Harder's online pipe connection template software
here. I made my own machine ports to replace the 4" versions in order to maintain high airflow -- here is an example of how I make them and one installed on my tablesaw.
Like Geoff Doebs, I have a ClearVue CV1800 cyclone (but it is not installed yet, shhhh!).