If there will be a lot of contrast (e.g. light poking through clouds, but otherwise much of the scene in shadow) then I'd say none of the above. I'd recommend Astia 100F and if you need the speed, provia 400x.

That said, my favorite of the velvias is 100, and I have a few shots in overcast conditions with it that were reasonably successful. It handles contrast fairly well; here is an example.

Overall, the velvias are really best for fairly flat light, in my experience.