Interesting about Don's in Regina - in Winnipeg their selection of B&W has decreased substantially, along with their staff knowledge. I was in one store a few months ago - their film fridge had a few rolls of Neopan and some TMAX, but that's about it.
I asked a sales associate about either BW400CN or XP2 in 120 format, got a blank stare - she asked someone who basically pointed at the fridge, and she proceeded to show me the Neopan and TMAX. Not impressed.
Also, the last time I brought colour 120 film to get processed (6x6) I was asked if I wanted "regular" prints made - assuming of course being a "professional" shop they knew that "regular" in this case would be square. I got back cropped 4x6 prints. Also not impressed.
So, now in Winnipeg I frequent Photo Central, which has a good selection of film (Ilford, Kodak, Fuji, some Agfa left), paper, chems (Kodak and Ilford, primarily), gear and most importantly has a knowledgable staff (older guys, primarily). They also sponsor a new-ish photography school in the city. (Apparently they outsource their B&W development, which when I used it last resulted in strange development and scratched negatives, so thus far that's the only black mark I've got against them - but I'm buying the stuff to do my own shortly, so that will be much less of an issue.)