I'm looking at a lens, the Canon 70-200mm f/4L USM, and the price isn't all that bad compared to some of these other L lenses I've seen. But it doesn't have image stabilization. I don't have steady hands (and I'm not even 50 yet :blushing and I plan on using a monopod when shooting outdoors anyways. So is IS important to you in a lens? What are your thoughts?