I like the Ilford films, and develop them in Diafine. Pan F+ at box speed ISO 50 gives good tonality and is almost grainless. Just a few years ago I finished shooting some that I'd bulk-loaded back in 1982! New stuff since...
I've shot FP-4 for years, but little recently. EI of 250 in Diafine with crisp tight grain, looks particularly nice with half-frame negs. I've never cared much for Plus-X; my recollection is a sort of harshness in the tonality.