I am looking forward in upgrading my Sigma 70-300mm f/4-5.6 to a more descent model, as this lens is horrible at 300mm when shooting without a tripod. First I a laid on the sigma 70-200 f/2.8, but ... wait a second? How about those famous white Ls? I checked a review, and thought that it's better to instantly jump to them, rather than having to waste first 600$ then another 1200$. SO, here is what I think: Sigma 70-200 f/2.8 - lacks image quality, but price fits me ! Canon 70-200 f/4 - L for a little more than a sigma. Something fishy. Canon 70-200 f/4 IS USM - This sounds to fit me too. Just have to save for an year for a new one. Canon 70-200 f/2.8 USM - No IS? But fast. Canon 70-200 f/2.8 IS USM - TOO EXpensive! Any personal recommendations? Please give me something! Maybe all pro's are soon going to go and sell there 70-200s , as canon is about to announce some kind of new hybrid-IS 70-200 lenses? Thanks in advance.