Oh and in regards to animation/BSP etc.

Importing animation in 3D models is essential obviously. I'll use either colladas or 3DS files.

As for BSP, probably a bit unnecessary. I'm working on a grid or quad tree for collision detection. For levels that are as tall as they are long/wide, I'd probably have to make an octree.

And about lighting, I think for the most part baked textures look fine, as long as the graphic artist does a good job.