Many thanks for the responses, really appreciated. The image quality, especially at high ISO, is brilliant. But I do worry about being able to take rapid moving subjects and the focussing and it makes me think that perhaps I should go for the A65 (as I can't afford the A77). Mind you, I have also been thinking about a complete switch to the Nikon D7000, but then there is the cost issue again. If only Sony could produce a NEX with a rapid focussing capability......