I've got a 20x20 shop, and have used a 650 cfm Jet dust collector for
several years. It handles my planer, jointer, tablesaw, router table,
etc., without a problem, as long as I've only got one machine
connected. I get by with a single 10' flexible hose, and don't know how
well it would work with metal or poly pipe plumbed through the shop. As
a hobbiest, the time it takes to move the hose from one machine to
another doesn't bother me, so I've not worried about a fixed
installation, and its' resulting loss of flow through elbows, etc. The
1 micron bag, or better yet, a canister, is on my wish list, however.

Ron