Re: Hose decision
The KM smokes far better than either of the other two.... until you wash it once and get rust in your mouth. They make washables, but good luck finding one in the US right now. Unless the hose says "KM Washable" it's NOT one you can put water through.
My Razan has seen every possible flavor, and a simple rinse with water for 10 seconds cleans it out perfectly. Plus, it won't pull over smaller hookahs like the KMs.