I also strongly support the request for more complete soft proofing tools.
Especially the simulation of the paper color would be really helpful when using expensive professional paper
(either by printing yourself or having the images printed externally). There really is a need to be able
to adjust the images to cope with the paper color to avoid disappointment when the images come back
from the printer - just as it happened to me last week. This can easily become really expensive when
printing large formats on expensive paper.