Hey everybody, Kind of thinking aloud before making the plunge... So I'm getting myself a nice 17-40mm (up/downgrading from Sigma 12-24, depending on the point of view), and having 24-105mm, I thought I might "not" need it often. So I was wondering what do you guys think of selling the 24-105 and buying a 70-200mm F4IS instead? In another words, which combo do you prefer, 17-40 & 70-200F4IS, or 17-40 & 24-105? In my opinion, the former will make a great duo of landscape lenses. I'm sure I will not miss the range in between, as I use to shoot with primes for certain subjects (having CV20mm and 85mm1.8, and not missing much in between). By the way, I'm not a one-lens guy to carry the 24-105mm alone, but I don't even think of carrying around 3 lenses with me. To my experience, the third lens is always a nuisance and an excess weight. I've got a classic 5D, btw.