I just received a brick of 20 rolls of Fuji Superia 1600 color negative film (35mm) I won on Ebay. The film is dated 3/2007 but was claimed to be stored in cool evironment. I love the results I get shooting TMAX 3200 rated @ 1250, 1600 ...beautiful grain. I recently purchased a book with many images shot with high speed color film and thought I would try some shooting with high speed color film to achieve that look. I had shot some images many years ago of fireworks with this film and got some interesting results. So, what do you recommend I rate the film to bring out the most beautiful grain and not comprimise color shifting or other factors (images falling apart too rapidly as I enlarge) too much? I know film can lose speed over time but I don't know if that is an issue for recently expired film? Should I just rate it at box speed? Thanks!