Wich Expansion to download?

Wich expansion is needed for Lordaeron? Old models or new models?

Whichever one you prefer.

Wrath of the Lich King (3.3.5a)

I would go with the old models, Somehow I think the new models cause crashes

New models have like half the textures missing, and since the client was released there hasn't been any sort of patch for it's current state. The old models are quicker to download, too. Your choice, though, neither interfere with connection