Pan F plus is an excellent film. Easy to use, nice contrast, tight grain, blah, blah, blah... I heard the same things about Fuji Acros, it's similar to the T-MAX and Delta 100 films. I think the only really impressive thing I've heard about it is the *supposedly* better reciprocity characteristics of Acros compared to T-MAX 100.(posted 8513 days ago)Use large format and don't worry about that silly grain problem.
Cheerio