I love my 70-200 f/4, though I would get the IS version if you can spare the extra dollars. It's lighter and less bulky than the 2.8 version, so unless those extra f-stops my preference is the f/4. I've heard excellent things about the 300mm and 400mm prime lenses, but I haven't had the oppertunity to use them yet. However, depending on what you intend to shoot the prime lenses may be limiting - in which case the 100-400mm might be better, though not quite as sharp.


Lucky you to be getting the 1Ds Mk III ! I'm only a little jealous...