I just got through "testing" Tri-X & HP5+ against TMZ & Delta 3200. (I'm comitting for a year, so I thought it was justified.) TMZ @ 1000 and Delta 3200 @ 1600 are pretty damn good and don't really suffer from the T-grain look. The difference I notice is a spectral response difference -- I bet that the modern films have higher red sensitivity. (Anybody know?) I ended up going with Delta 3200.(posted 8807 days ago)The amount of sodium sulfite Mr. Hicks recommends is similar to what you'd see in XTOL 1:3 or D-76 1:4 --- not enough to dissolve your silver appreciably.