After 9 hours and at 400 S/px, this is what it looks like using the values suggested here; metropolis, bidirectional and gaussian. Almost clean, just a little bit left on the sofa and blinds.

Software: OS X 10.8 - Poser Pro 2012 SR2 - Luxrender 1.0RC3 - Pose2Lux
Hardware: iMac - 3.06 GHz Core2Duo - 12 GB RAM - ATI Radeon HD 4670 - 256 MB