My main focus is aviation photography. I've been using a Fujifilm S8000 for about 2 years now, and I think it's time to bite the bullet and upgrade. Now my question to you is; what's an ideal upgrade? I take photos of static aircraft, as well as some air-to-air, air-to-ground, and ground-to-air. With the ground-to-air photos, I'm normally about 20m-80m away from the aircraft (100m+ when at airshows). My budget isn't huge, so I can't afford those very juicy lenses all the professional aviation photographers have. I just want something that will get the job done nicely. My knowledge isn't that great either, so I'd like something relatively basic (I am willing to learn though!). A friend said I must look at a secondhand Canon 450D with a 18-55mm lens. He then advised me to get a Sigma 300mm once the bank balance is in the green. Yay, nay? I've also been looking at the: Canon EOS 1000D Nikon D60 Nikon D3000 Had a look at the Sony A 230 and A 330, but I'm leaning more towards Nikon and Canon. Please note that I live in South Africa. Budget is about R6000, R7000 at a push. So, approx $800 or 500 Euro. Thanks in advance.