I frankly miss having a grainy film available. Old Tri-X (ie from the 70s) was definitely grainier and not as sharp. The new stuff is a better film if you want finer grain and better sharpness - it's kind of like HP5 on steroids. It makes beautiful enlargements (this is a scan of a 5x7 enlargement). In Rodinal, it still has a real presence and exceptional shadow detail:
Tri-X at 400, Rodinal 1:25 for 8 minutes, Konica Autoreflex and 50mm Hexanon f3.5 Macro lens
I've had no trouble with blown highlights with Fomapan 400, which I like a lot. I use either XTol 1:1 for 8 minutes at box speed, or HC110 at 1:63 for 11, also at box speed. Here are two examples of these developers on this film (these are scanned 5x7 enlargements)
XTol 1:1, Fomapan 400 at 400, 8 minutes. Pentax MX, 50mm f4 Macro lens:
Here is a snow shot, a surefire recipe for blown highlights, taken with an Olympus Pen FT on Foma 400 at 400, with HC110 at 1:63 for 11 minutes. Lots of detail in the snow.
I know people have said to rate it at 250 max, but my best enlargements and digitized negatives (I use a lightbox and a macro lens and reverse the digital image in GIMP) have come rating the film at box speed in all formats and developing as above. I simply don't overexpose and underdevelop. I've just never been happy with the results.
I'm currently experimenting with Pyrocat HD on this film and will post the results when I finish.
To get really grainy pictures now, I use Foma 400 (or Kentmere 400) in a half frame SLR and develop the film (which has been exposed at ASA 640) in Rodinal at 1:25 with double the normal agitation. Here's an example of this (Pen F, Foma 400 at 1/2 stop under if I remember correctly) Rodinal 1:25
Highly dilute HC110 is sensational with Foma 400 at box speed, as is Xtol. I'm going to try semi-stand developing at 1:100 with this next time. I still like (and always have) Rodinal or one of it's clones for Tri-X, new or old.
Again, bucking the trend, I still use colder solutions when developing, right at 68. Old habits die hard.