HLing, if you are shooting b&w, i would suggest a yellow filter. If I can refer you to my pictures, had I used a yellow filter, the sky would NOT be a sheet of white but instead there would be more details like different shades of clouds.
However, filters do have its downside as it complicates exposure calculation, it isn't difficult but its something you have to compensate for, for example, all yellow/orange/red filters have a filter factor, and the filter factor translate to number of stops for compensation:
UV = clear = 1 ffactor = 0 stops compensation
Light yellow = around 2 ff = 1 stop compensation
Dark Yellow = around 3 ff = 1.5 stop compensation
Orange = 4 ff = 2 stop compensation
Red = 8 ff = 3 stop compensation
what this means in shooting is that if you shoot at say, 1/125 and f8 and iso 100 before a filter, you would have to provide more light if you shoot with a Light Yellow filter, (ff =2, 1 stop compensation) : either 1/60 and f8 or 1/125 and f5.6 or change the ISO, ie. 1/125 and f8 but iso 50.
hope this helps