With the caveat that you really should read all the info Muirenn is linking to -- your problems sound similar to mine, and I think we might sit the same way. I have been happiest with the Bontrager Affinity RXL. This has the least padding, compared to the Affinity RL and Affinity R. I tried both of those and had problems with numbness and pressure up front. I personally go with the medium width, which is 144 mm I think. Any LBS that sells Trek bikes will also sell Bontrager products, and will have a saddle measurement tool that you sit on to determine the correct width for you. Or you can do the measuring yourself and order from Bontrager online. Either way, they offer a 30-day comfort guarantee.
http://www.bontrager.com/model/09729
Note that you may need a different saddle clamp to work with the rails on the RXL. The folks at the LBS where I bought my saddle helped me with that. It was not expensive, and since it was from Bontrager it also had a 30-day guarantee.
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles