Originally Posted by M_S
squishy seats are comfortable for 20 miles tops. After that everything gets pinched and your sit bones aren't doing the sitting... making for a hellacious experience. What you want is something ergonomic, not soft.
How far do you plan to ride?
Your opinion. I have a gel seat that is perfectly comfortable at 70 miles (the longest ride to date). I see no reason why it would not be comfortable for another 30 miles or so. Granted my saddle isn't super soft but it is not a hard as a rock type saddle either.
To the OP,
While you might get some guidelines from others, when it comes down to it, a saddle is a personal choice. You are just going to have to try a few to find the right one. Try to work with a LBS or online store that is willing to allow you to return the saddle if you do not like it.