If you plan on shooting at '400 at f/11, you had better save your shots for sunny days only, and avoid shaded areas of your composition if you want any detail there.
4x5 will give more depth of field than 8x10 at a given angle of view and f stop.
Tilts and swings will do the same things on both formats.
Modern films are extremely good. You may be able to get the enlargements you want from 4x5 film. It would only be about a 10x linear enlargement. That is up to you, though. I'd try blowing up a piece of 4x5 to see how it looks at your intended print size and viewing distance. If it just isn't sharp enough for you, then I would use 8x10.