I just bought a new saddle for my bicycle, and I have to tell you all that having that slit or hole in the middle has made all the difference in comfort for me. It's relieved a lot of pressure on 'you know where.'
Anyway, I have to admit I was pretty clueless about buying replacement seats until I read a great article on what to look for. It addressed the pros and cons of material, shape, etc.
I'll share it here, if that's kosher: http://www.bikepartsplace.com/articl...for-me/#more-3
This site, bikepartsplace.com, has a lot of interesting articles and information for bicyclists. Thanks for welcoming me.