Originally Posted by Birdmove
Anyway, any of these saddles look decent?
You simply can't buy a saddle online, without trial and return. You'll pay all the shipping, which will get expensive. I'd suggest heading to your LBS. There, you can try anything they have without spending a dime, until you find something that feels good. Unfortunately, that may take more than just a spin around the parking lot.
You're doing mileages that are pretty ambitious, on a MTB. I imagine you're sitting fairly straight-up. That puts an awful lot of weight on just your butt. LD MTB riders run their setups pretty far forward, so that they're evenly distributing weight between their butt, hands, and feet. That's partly why road bikes are setup with the rider in a forward lean.
Lastly, when you see cyclists wearing lycra clothing, they're wearing that because the shorts have a chamois pad in the seat of the shorts. That pad isn't there to "pad" the butt, it's there to break the friction between seat and skin. The outer of the shorts/chamois stick to the seat and the inner to the skin. Without such shorts, your skin is taking all the friction and torture. The weight distribution, cycling shorts, and time on the road all contribute to one's comfort.