sell the canon 60d for zeiss 24mm ?
I had exactly the same decision last year but had the 60D and 24-105 L. I now have the Nex 7 and CZ24 and very happy with it. I don't notice any loss of IQ at all. The only thing I miss sometimes is the fast focus but I have just bought an LA-EA2 adapter so will see how that goes for situations where I need fast focus.
My original post is here: