I wonder what the frame rate might be in Ogre.
One of those models as about 34000 faces...
The models look great, but a small group of buildings and a few character models and your frame rate might be a bit low.
On the other hand, there are nice LOD models included with this pack

But a fast turn in the middle of a market place where you can see all the models in its best resolution, might be a bad idea.