I have a Trek 7.2 FX, with the stock seat. I'm fine with it for about 22 miles, but then it starts to get really uncomfortable. I'm not sure if a new saddle would help, or if I just need to suck it up.
I do wear bike shorts, and I weigh 275. I realize that being a big guy I'm putting a lot more weight on the saddle than a smaller rider. I rode some last year, but stopped mid season, and I have about 180 miles in this season. I feel like saddle pain is limiting me from going on rides of 30 miles or more, but I'm not sure if a new saddle would help.
I've looked around and I don't think any of the bike stores near me have a saddle testing program, so I would probably have to buy one new and hope it helps.