I just shot a few portraits with Tri X and my Hasselblad using strobes and a soft box. I wasn't crazy about the results, too low contrast. The thing is I had a lab process the film and make the prints. If you use a lab, I think you should run a test of the same shot using a few different kinds of film to see what works best. If you're developing and printing yourself, then it's a whole different story. Generally, I've had really good luck with TMAX100 or 400 with lab processing.