What do you mean by pressured water and front 20' disappears? I've been contemplating on trying airflo lines for my 4/5 weightI'll give some props to the Kiwi's and their Super-dri Bandit line. Been testing a WF6 for about 5 months now on several Winston rods and its a great line for pressured water. Front 20' virtually disappears on the water with no direct sunlight on it.
Its pretty much a true AFTMA 30' head so keep that in mind. Great line all things considering.