Two IBL lights are rather much for one scene.  Typically, only one should be enough.  Problem with IBL as a global illuminating source, it has a tendency to flood shadowed areas with too much brightness.  In that office image, you are losing shadow detail under the model, chairs and table.  Undesirable if you are striving for a more realistic render.  Also, the table appears to be self glowing, I wonder if there is an active ambient channel in it's PoserSurface in the Material Room.

And BTW, IDL rendering in PP2010 and P8 can take a significant amount of time, depending the complexity and composition of the scene.