Tom,
I have very limited experience with Pan 400. I tried Fomapan 100 and I liked its tonality when developed in Rodinal 1:50. I found it to have a long tonal scale, although it does require careful handling (unlike HP5+ for example) during processing.
Right now I'm using Foma (T)200 and I like it, but it probably will not become my favourite film (we'll see...). I gain little compared to Foma 100 with it (EI 100 vs EI 80). It's good, it can have nice tonality at EI 100 in either Rodinal 1:50, or ID-11 1:1.
Pushing it to 400 is OK, but it doesn't have the latitude of the classic legends, like HP5+ or Tri-X. But that wouldn't be a fair comparison.
Grain is apparent, but I don't find it unappealing, however, this is subjective. For general use, with moderate cropping for 8x10" prints it's OK for me.
It builds up contrast quickly so one needs to be careful with exposure and developing.
These are only my observations, others would probably have different experience with this film.
As I mentioned somewhere else, according to my own measurments the 110 lp/mm resolution for Fomapan 200 is correct.
So many different films (luckily), so little time.:rolleyes: