Good idea to stick with water...not only is the cleanup easier but I'm sure it will reward you with more yield once you tweak the system

On the subject of taste I'm sure there is some difference but if you flush properly it's gotta be pretty minimal anyway...flush times differ greatly but I tend to lean toward a week unless the plants are gigantic...

A side note on taste...I've used a magnifying glass to light the mj instead of a butane lighter and the taste is out of this world especially since the last hit will taste almost exactly the same as the first...