This is a photo of the seat that came with my Trek SU300... I shelved it just after I bought the bike and used a fat gel seat for about 18 months. (6years ago I was a fatty

)
Bontrager Hollow Race Lux bicycle seat ~ Cheap and comfortable.
It's back on the bike right now but I plan on getting something like this. The cut out seats seem to be very popular right now.
Everybody is different. Your pelvic bones will determine what's best for you.