I have something else to add that I'm not sure was made clear earlier. My question isn't whether disc is better than cable. My question had to do with peck order of the grade of brakes mentioned.
Maybe a better way of asking this question would be this... If you were to equate Shimano 485 to the lx,slx,xt,xtr grade what would it be? Likewise with the BBDB. Would the BBDB be an xt grade or lx grade? stx grade? I don't care whether one style is better(hydro or cable) I just care which is the better grade. I don't want to send him a set of brakes that are Wal-Mart equivalent if he already has xt.