Wide angle for landscape is one way to do it, but I would question why anybody would choose to go wider than 18mm on a landscape unless you were trying to pull off an unusual effect... for general use? No. Better quality? Well, honestly that kit lens is pretty darned good, I would wait until the limiting factor to your success is the lens (i.e. you perfect EVERYTHING else about shooting landscapes) before upgrading for landscape purposes... If you had said architectural photography or sports, then that would be another story... but landscapes will be fine with your kit lens.