I haven't tried Delta 3200, but here's what I know: TMZ is really an 800-1000 speed film, so EI 1000 would not be a push. I think Xtol has one of the best speed/grain ratios of the popular developers. Microphen can increase real speed about 2/3 stop without a contrast increase, with most fast films. I use TMY @ EI 800 with Microphen, with better grain and sharpness than TMZ @ EI 800 in Xtol. TMZ in Microphen @ EI 1600 looks pretty good.(posted 9210 days ago)