BTW Ilford HP5+ is the ISO 400 film and FP4+ is the ISO 125 film.(posted 8680 days ago)But as the others have said, Kodak Plus X or Tri X or Ilford HP5+ or FP4+ are all good films.
Develop in Kodak D-76 or Ilford ID-11 (bascially the same developer, pick the one that is easier to find or cheaper) or Kodak Xtol. If you try Xtol make sure that the date code on the wrapper of the 1L packages says 0025 or later (0026 is later than 0025). The earlier packages had some trouble.
These combinations are very good and will produce reasonable results starting out. Many of us use them today. I am just starting working with the Ilford films and Xtol, but have used a LOT of TriX in D-76 over the years.