Doing a little extrapolation, I'm going to say they will be just about 8 pounds a pair.
180 Kabookie = 1843.6 g/ski
180 Bonafide = 1935.2 g/ski
Difference = 91.6 g/ski. The only difference between the two is the metal matrix.
180 Bushwhacker = 1766.8 g/ski. Same profile as the Brahma
For the Brahma, add the metal = 1858.4 g/ski = 3716.8 g/pair
Convert to lbs/oz = 8lb 3oz
Since the Brahma has a smaller profile than the Bonafide, it will use less metal. Dropping 3 oz per pair for the difference doesn't sound unreasonable. Might even be a touch more.