Efke pl100. Cheap, well, inexpensive anyway. Freestyle carries it in most ulf sizes.
it has excellent tonality and is very forgiving in the dark room (important since I'm rather cavalier in my technique) It is available in every format I shoot and many I don't, so I can standardize on one emulsion which is always a nice thing. I've never heard of a quality issue with the 100 speed Efke from anybody real or in cyberspace.
That said, TMY is great stuff to have in you arsenal of emulsions,but if I don't need the speed or reciprocity characteristics Efke is my choice. FP-4+ when it is available in ULF is also a good choice.
I soup the stuff in a UNicolor processor using the 16x20 print drum. Figure the surface area and extrapolate the date given on the Unicolor article on the Large Format Homepage. Cheap, efficient, nice!