I have used both rodinal and pyrocat hd for these films and really like the results. With both developers I dilute quite a bit. I would try either and work with it for awhile, learn how it reacts, works, etc. With either rodinal or pyro (any flavor) the real results are seen in printing.
Rodinal can be purchased from almost any of the sponsors of this site and pyrocat can be purchased from photo formulary OR you can piece the chems together from any chemical store (Artcraft, Sigma, etc.)
A suggestion, Anschell's Darkroom Cookbook really helped alot when I decided to stray away from Ilford's ID-11 developer and enter the mystic realm of B&W developing. He lays out how the chemicals work in each developer, strength/weakness, then goes into fixers, paper developers, toning etc. Good reference book.
Erick