saint wrote:
+1 on ben saylor's partconv~ - works excellently.
arm yourself with the free acousticas IR's... http://www.acousticas.net/World/IRs/AcousticasM7.zip
of the $3,500 bricasti m7 unit... http://www.bricasti.com/m7.html
...and you'll not go back to algorithmic reverbs again.
or just get some balloons and record your own!
Or even better use Fons' great application Aliki: http://www.kokkinizita.net/linuxaudio/ lac.zkm.de/2006/papers/lac2006_fons_adriaensen_01.pdf
best, P.