Agree with Reality is great renderer,but its slow and if Luxrender in next installment will support GPU rendering then maybe this will help us with faster render times,GPU renderers are still faster than CPU renderers,for fast CPU render you will need render farm which for most users this is not simply option

If Paolo will release Reality for RenderMan version then this can bridge the gap to other renderers

IRAY is not bad renderer,but if you AMD/ATI owner then you will need to run in CPU mode which is slower than GPU mode.probably best will be if SM/Poser pro support some sort of the GPU/CPU renderer based on OpenCL,where you are not tied to GPU maker(with IRAY you need to have nVidia GPU like with Octane)

Out are few good renderers  which are GPL free or paid programs too which would love to see be implemented in Poser Pro

Thanks,Jura