My only question is how well the K-3 does at higher ISOs. Take a few in low light at ISO 3200, 6400, and 12,800. Make sure the camera is rock steady, say, on a tripod, to ensure sharpness. Stationary target is fine, so that a long shutter speed will work. Examine the RAWs for, especially, noise. Whatever the noise, and there will be some, how well does it clean up in PP (say, Lightroom)? And does it clean up as easily as the K-5iis?
By the way, I expect this project done by tomorrow morning, 8:00am, or you're in big trouble.