There has been a contoversy swirling around how ACR processes RAW files at high ISO from Sony A700 as opposed to Nikon D300. It would be interesting, Michael, while you are evaluating Aperture v.2 to run a comparison of how RAW files from identical sensors in these 2 brands are being processed. This is especially of note because Leopard has just been updated to handle these new cameras. If it will help, I would loan you my A700. I live in Toronto, so it's no big deal for me.