Does it matter which brand I get vis-a-vis the brand of film I use?
Bottom line: NO. Chemicals all work on the same basic concepts. Developers do their thing (convert the exposed silver to something else, something like that), stop baths neutralize the developer, fixers remove the undeveloper silver, etc. Technically speaking, you can use any developer/stop/fixer combination from any brands with any film. Of course, that doesn’t mean there aren’t some combinations that are better than others. See my Developer’s and Times page for my input on various combinations.