Bangkok visit. Which lenses/camera's to take???? Help

Hi all,

I'll be visiting Bangkok next week for a short 1 week break and am keen to take lots of pictures. Will be street shots, some portrait etc. Well, any nice shot I can take during the trip really.

I currently own:

Sony Nex-7

Sony Zeiss 24 1.8 lens

Sony zoom lens that comes with the kit (never been on the camera actually)

Canon 1 DX

17-40 f4

Sigma 150mm Macro

70-200 2.8 II

I have funds for one more lens e.g. 85mm 1.2 II or 24-70 II or perhaps 35L 1.4 (although I have the Sony/Zeiss with same focal length)

Would appreciate advise what I should take with me on the trip and the extra lens I should buy (if needed).

Many thanks for your feedback!