Nice ideas! GTA Matt you have inspired me to pick up some Ernst wrench holders. I have never been satisfied with the layout of my wrench drawer, I think this should work out just fine!
Racks are just solid copper wire that was wound around a pipe like many people on here use. You can't see the wrench sizes with the wrenches straight up like that so I wrote the wrench sizes as big as I could on the wire insulation with a red paint pen.