I ride the Selle Italia Lady (Ldy) Gel Flow and it is saddle nirvana for me My longest ride on it so far has been about 6.5 hours and no discomfort at all. I must also note that I do NOT stand in the saddle (ever) as I am a relatively new cyclist and have yet to learn how to do that yet.

Our butts like what they like and they are quite particular. Measurements help, but there is also some subjective elements here as well. I tried several saddles that, from the measurements, should have worked and were agony. Good luck on your search!