My 2 cents: I have been lucky with saddles and I have not seen either one discussed in the other threads.
I have a WTB Speed She (available through REI for $35) in my road bike. I have done several long rides (62 miles to 105 miles...) and the saddle was not an issue beyond being tired of sitting on it. I have to acknowledge that I have good bike shorts (I like Pearl Izumi ultra and microsensor) and "going comando" made all the difference in the world.
In my mountain bike, I have a Serfas Women's Terazzo Select (
http://serfas.com/performance_saddles/TRCW.shtml, MSRP is $100 but I got it for $60 in a local bike shop) which I like a lot. My MTB rides (1-3 hours) have not been as long as the road ones, but I do not notice the saddle.