I'm currently working on something that is 1100mm tall and maximum 200mm diameter. I'm going to need to print this off to 1: 1 scale but having only had to rely on screenshots for most of my rendering up until now I'm not too sure what settings I need to adjust to get the right quality image. Do you know what settings I need and is something this big likely to take a long time to render?
Why don't you give us the FPS you get with the benchmark ... I think lots will depend on your computer speed.
See this topic: http://keyshot.com/forum/index.php?topic=2270.0