Get rid of the "Z-link things" and get some regular straddle wires; they allow more adjustability without having to guess the right length. I find that the brakes work better with a lower rather than higher wire setting. Also, if you don't have a fork-mounted cable hanger I would strongly suggest that you get one; it will likely take care of your problem. I like the Specialized Tricross Front Brake Hanger but there are others which work as well.
I have found that the Problem Solvers Wide Cable Hanger works well with the regular straddle wires:
http://problemsolversbike.com/produc...cable_carrier/