William, the np27 film may be the same as the efke kb25. If you read through the deja threads there seems to be much confusion about this.
I have used the classicpan 400 and it is not as nice as nice as efke in pyro, even at 100 asa it is very thin and lacks contrast. It picks up tons of stain. I have scans of classicpan and efke negatives on my website if you would like to compare (www.post-modern.net)...
Classicpan 400 behaves normally in D76 and is a good film for someone who wants something that is relatively fast and inexpensive.