I use RC paper myself frequently when I need paper that is quick to use, self-glazing and self-flattening. I also believe that RC permanency is quite good these days, but I wouldn't back it against FB. FB is more expensive, but not to any significant degree, it takes longer to process (particularly washing), but again this is not an issue, it's MUCH easier to retouch and tone, and it's implanted in buyers' minds (rightly or wrongly) as being a superior more permanent product, which for me is reason enough to use FB for prints for sale.