SSid,
While we're on the types of camera, if you're flying SP and planning on taking photos, most SLR size bodies are not feasible, being just too bulky. At the other end, the compact (Canon Exus, etc) size is not user friendly for one handed operation when in a flat format
FWIW, I chose the Nikon 5000 (now superceded, but its successor is the same size) as a compact but one handed 5mp Digital. Quite cheap now (<$A900) and excellent capabilities along with a fold out screen, making it easier to line up for that essential shot out of the side window in flight
