cj ... go for the lens. Also, stop stressing over the lack of in body is. It is a non starter for 90+ % of your actual photos. IS matters for long lens + long shutter, but should never bother you with that lovely 25mm Zeiss. What mount is the Zeiss? I'm sure you can find an adapter to use with the Nex.
ASR - nice shots, show us more. I am away atm, otherwise would arrange to meet you in Sarasota or near by.