Delta 400 has replaced HP5+ as my 400 speed film of choice in 35mm ( sure wish it was available in 4x5!). I think you'll find it a fabulous film. I mostly develop it in my own catechol fomula or Gainer's vit-c developer, although I've tested it in a number of other developers as well. I haven't really found a developer yet that it looks bad in. I think what you'll find is is will look great in both Rodinal and XTOL, just different. So which you prefer will be a subjective choice only you can answer.(posted 8106 days ago)If you choose Rodinal, you might want to try Pat Gainer's suggestion of adding 4g (or one tsp)/L (working solution) of sodium ascorbate (do not use ascorbic acid). Use 1:50 but use the development time for 1:25. I think you'll be very happy with the results.