Has anybody tried the impulse modeled reverb plugins?
You can try a free one here. (One of the best)
http://www.knufinke.de/sir/index_en.html
With Voxengo Impulse Modeler you can make your own impulse responses.
http://www.voxengo.com/imodeler/
There`s also some sample cd`s of impulses from different environment available, but there are impulses available on the web taken from hardware reverb units aswell