Selle Italia Flite works for me.
my favorite saddle of all time!
people are going to debate this possibly but first thing about saddles as Xela said is it is personal preference. the saddle above is on almost every bike i own. road mtb both. when you find the one that fits you, just hope they never quit making it.
two pieces of advice
1: cushy is not usually more comfortable for long riding! or short in my opinion. saddle width and design are much more important than padding. when you ride a lot you will develop muscles where you used to get sore. i only wear riding shorts or bibs on rides over thirty miles... the shorter ones my toosh just doesn't care either way. my body has gotten used to riding. you need to find the width and length of saddle that works for you. i could tell you mine but it will be worthless since we are shaped different, weigh different weights and i am certain ride much differently. a squishy, cushy saddle does exactly like Xela said squish out and make pressure points. saddles also flex and you need one that flexes right for you.
2: price is going to matter, good saddles are not cheap, thus do not get a cheap saddle. the more expensive ones keep their shape and thus fit better. i am not syaing the most expensive one is best... Selle makes a more expensive model than the one i ride that has gel in it and while i like it for shorter rides after about 3 hours i want to pedal standing up... while the model i ride i am good for the whole day on it.
make sure the saddle is angled right.(not sloping either way) if your seat height is incorrect you can get sore in the butt as well... i have experienced this first hand.
ride as many as you can before buying one. i know this is not easy to do and the other problem with this is sometimes a saddle can be awesome for two miles and awful for twenty.... One other word of advise in my experience saddles made for women are squishier and wider. they usually suck! while we will like a little wider one than most guys are height and weight, the non women specifics are better.
good luck, in my opinion this is the hardest purchase in cycling! a perfect saddle (for you) is out there, hopefully you can track it down.