Re scratching, that was my experience with XP2 also. At the time I was using a Nikon LS1000 that didn't have digital ICE, but I'm sure current scanners can handle the dust and scratches OK.
I thought the benefit of using chromogenic black and white film was to easily get it processed at your neighborhood lab. But if I had to send it out at a "pro" lab and the costs associated with that, I'd rather have a small set of B&W chemistry at home and a couple of tanks and do it myself, using regular black and white film. For me, shooting black and white film goes hand in hand with permanence -- I'd want it to last (dyes fade, silver halide doesn't).
If I were to scan black and white, then I'd rather just shoot color neg and do black and white conversions in Photoshop (most basic method using monochrome channel mixer). Some of you may be offended by this suggestion, but you would be surprised to know that much of the black and white photojournalism you see in the news magazines today are made on digital cameras (color) and converted to black and white! Most use Fred Miranda's black and white conversion tools.