I thought the Eckta Chrome and Velvia and Provia were slide films? UH I have used T400 and I think T-max. I thought the T400 was more contrast. Night stuff I would stick with 400. If you can afford to keep your shutter open you have got it made. Otherwise you are going into 800 ASA that stuff is grainer personally I dislike grain. Indoor. Try 200. It's not as fast as 400 so it may be a little darker but there should be more color. Take a look below there is a discussion about B/W films and T-max or T400. Have you considered Agfa films? Bsteph