Well I tried using the stock saddle on my Jamis Aurora over the past season and finally swapped it for a Brooks B-17 Imperial like I have on my other bike. Night and day difference in long ride saddle comfort. I stop every hour or so while riding (if there is a bathroom available) but other than that I pretty much never need to get off of the Brooks.
Hard to tell what will work for you, but I look for some alternatives. If you have a bike coop nearby, you might be able to borrow some different types to see if something works better for you.