<p>I have a chance to finally purchase an "L" lens, and have narrowed the possibility down to 3 such lenses.<br> I have personal reasons as to why any of these 3 would work well for me. But I want to know the general consensus as to which you feel will/can deliver the best Image Quality of the 3.<br> #1 Canon 70-200 f4 IS USM<br> #2 Canon 70-300 IS "L" USM<br> #3 Canon 100-400 IS "L"<br> Based on a lot of research on review sites, I'm thinking that either this order (as I have listed it) is about right, or #2, #1, #3. But is #3 really the weakest? I'm well aware of the pros and cons of each lens's focal lengths and how they can best be utilized. I'm simply asking your opinions on the quality of the image. <br> Thanks</p>