You get you what you pay for with the Canon EF 200-400mm f/4L IS USM Extender 1.4X: superlative performance and flexibility.
An overall excellent camera, but one that fails to capture the best-in-class prize for image quality.
Pricing not available
The Canon EF 70-200mm f4 IS USM L lens is a professional grade 70-200mm lens without the size and heft, as well as price, as found in f2.8 versions.
The Canon EF-S 18-55mm IS kit lens is a solidly performing medium-zoom lens, with good optics and image stabilization, that will appeal to more than just the entry-level crowd.