Some nice choices there. I've heard the Canon EOS 400D is a great camera, just out of my price range at the moment. The Nikon and Pentax I mentioned are available at the moment for a great price.
Less money for camera = more time for flying
Would an 18-50 and 55-200 cover most uses? I quite like using a wide angle in the cockpit as i feel it gives a better result. How would these fare? Is 200mm enough?