plenty, but you'll get a ton of different answers.
best is to go to whatever your local shop is, if possible. sit on as many different seats there as you can before you decide to buy.
we can all tell you what we use, but that doesn't mean any of our seat suggestions will work for you and your butt.
that said, i've got these on four of my five bikes. i've tried many seats over the years, and just recently found this one. more comfy than anything else i've tried, for me.
http://www.performancebike.com/shop/...tegory_ID=5210