Ortho films and staining developer

I'm thinking of using staining developer for my medium and large format negs. Currently I use D-76 for everything, but want a new look. I was wondering if anyone has any experience using staining developer such as PMK, or Tanol, or any other type, with ortho film. I've spent the last few days checking through APUG for any references, but have seen nothing.
Thanks everyone for this great reference source.
Rick