One thing that I'd say is that I would not accept pain or numbness in the nether regions while riding. It sounds like a recipe for trouble.
I tend to nose-down my seats a bit, sometimes quite a bit, and believe the nose of the saddle should point generally at the bars, rather than being level. The more you lean forward the more you need to move the nose downwards.
I have looked at some of the SMP channel saddles, and may give one a try sometime. I believe they come in widths, so perhaps necessitating being fit to the saddle.