Following theft of 5D2 and roughly half my lenses by value, I think I need to consider alternatives as well as straight replacement when I get the insurance (would expect to get good price for 300/4IS, 1.4IIX 24-105 and 50/2.5 if I changed system). As landscapes are important and aim to do some studio portraits, I'm attracted to A900, although the only time I've tried it out, the body shape felt less comfortable than 5D2.
Apart from not having live view, the main issue is high ISO performance, which is important as I'm very much an available light person. I read somewhere that earlier versions of ACR did not handle Sony files very well and that latest ACR 6.2 (which I now have) is much better. Is this true and even if not, how well do Sony raw files at 1600/3200 respond to noise processing in ACR without softening?