Alison - I'd love to hear an update...
...on the WTB. As to your old saddle, I'm coming to that same point with my Serfas Rx. It was great when I was riding max 30 - 45 minutes. But now, I'm just in pain all the time. Mashed ladyparts I expect and to a certain extent I can stand, but my sitbones are hurting so bad I'm really bogging down on longer rides. It's this radiating pain that lasts for days - in fact, went for a 45 minute ride last night and it's bothering me to sit here. Basically, I'm turning for home because my butt hurts so bad I can't take it anymore! Whine, whine.
Anyway, you know what's funny? My new Trek came with a WTB that I instantly ripped off to put on what I considered to be my "fancy, woman-specific" Serfas. I'm thinking about popping the WTB back on. I envy your 25 mile ride with no pain! I want that Hallelujah Moment! I, too, have a husband who is starting to turn purple every time I mention another bicycle expenditure. I guess it's a good thing I got the Serfas at REI - because back it goes! - two months later, covered in mud...