IME posts 9 & 10 are correct. When Specialized first developed their Body Geometry saddles, which were supposed to end the possible ED issues among cyclists, they recommended that even with the BG saddles the nose be tilted down 2°-3°. Again, IME there is no "correct" saddle angle because everyone's pelvis and pelvic tilt is a little different. One has to experiment, both with saddle type and model and saddle position, up and down, fore and aft, and tilt. Over the years, I've given 2 boxes full of saddles to charity because one's saddle perfection also changes with age and musculature.