I have used a Serfas for Women for about 1600 miles with very little soreness. I have found that if your shorts bunch up you can become very sore. I also found that I had to tilt the nose down just ever so slightly. Here is a web site for Serfas.
http://www.serfas.com/comfort_saddle...addles_4.html.
Did a bike store fit you to your saddle? My bike store will also switch out saddles until you find one that you like.
Don't give up, it sounds like you are doing really well. I also am a newbie this year to road biking and have found that a good bike store makes all the differance in the world.
Sorry, no information on the Ergo saddle.