Take a look at the Gear and Accessories thread down below. There is a really helpful section on saddles. I suggest you take a look at some triathlon saddles they are made specifically for being aeroed or in the drops. Also take a look at the Selle Italia Diva or Max flite, long rails, huge cutout and padded on the pelvic area. Those are just a few I have tried and can recommend. Good luck hope that helps!