That said, there is an excellent option that offers the price advantage and toughness of a plastic boat with the light weight of fiberglass and Kevlar. It's Airalite, a high-impact acrylic material that started to appear on boats three years ago. Airalite is made in sheets, then heat-molded into a kayak. Very tough, great looks, weight on par with more expensive stuff. For example, the Perception Eclipse is a 17-foot boat, made with Airalite, that offers handling and space along the lines of the Chilco for about $1,500 U.S. (www.kayaker.com). That's not bad. I honestly don't know why Airalite hasn't simply pushed every other material out of the marketeven plasticas it looks ten times better for not that much more money.
As for the rudder/skeg questionwell, my guess is you know this, but they're not quite the same thing. The skeg is a drop-down fin that's directionally fixed, and that helps trim the boat in different wind/current conditions. The rudder is much more of a pure directional device. It's true that a good kayaker doesn't "need" a rudder, so you can regard that as an optional item. I like a rudder, myself. And the Eclipse comes with an excellent one designed by Cascade Designs, standard. They're simple systems, really, so while they do add a measure of mechanical complexity, it's not the bolt holding everything in place.
For more water-worthy hardware, check out Outside Online's Kayaks Buying Guide.