I'm looking to purchase a zoom lens and had narrowed it down to the Canon EF 70 - 300 f/4 - 5.6 IS USM Tele Zoom. Then, while on B&H's site today, I came across the Canon EF 70 - 200 f/4.0L Tele Zoom, at only 10 dollars more than the former. What are people's thoughts on these lenses? I know that the L series lenses are the top of the line with Canon, so its enticing, yet I would loose the image stabilization of the 70 - 300. Any thoughts?