My favourite cobination of film and developer is Acros and Rodinal which i use extensively. When I want more speed I have used HP5 amd some XP2.
However do you have any reccomendations for a iso 400 film and developer combination that gives results similar (clearly it will not be the same) as Acros. I use 120 and some 35mm
ps. as i Don't use a lot of film at this speed It would be nive if the developer had the keeping properties of Rodinal!