i currently have a ritchey seatpost with about 25 mm of setback, which is a little much for me; my saddle (alias) is all the way forward as is (approx but not quite at kops), so there is no adjustability. i figured i'd get a thomson (elite), and am deciding on setback vs none. the setback is 16 mm so even the setback one would be in the right direction from what i have.

since the setback can be used set-forward as well, is there any reason (other than possibly aesthetics) to get the straight post? between set-back, set-forward and saddle rail adjustment it seems the setback post completely overlaps the straight one in positioning. am i missing something?