B&H has been my go to for years. Occasionally I need a very special or long-discontinued item and search elsewhere, but honestly, B&H are excellent. I shop for digital and analog photography, but recently mostly (past year) I buy film based items for my shooting with Hasselblad, Mamiya 7, and 4x5, and good darkroom accessories—trays, tanks, safe lights (I have a huge 24 foot long darkroom), film sleeves, Ilford silver printing paper, Epson digital paper, hand blower for dust, etc. It's all pretty easy to find. Also I love the Peboo credit card thing. OMG I save the sales tax every time which really adds up. Must have saved over $100 the past six months.
So for you analog photo guys, check it out. Oh, and check out Lomography film. I have just used the B&W: Earl Grey, Lady Grey, and Potsdam are my favs so far in 120 format. I use Sprint developer with excellent results; also available at B&H. Image here is a recent Lomo Potsdam scanned with an Epson 850. So yes, analog is back, in my opinion.