As you have a Trek Dealer near you, you can go there and have them measure your saddle bones and recommend the perfect fit.
I have one of these and it is clearly my favourite...
Feels great and a lovely looking saddle.
http://www.competitivecyclist.com/pr...8833.35.1.html
I also have this one and it's pretty nice to ride on too.
http://www.evanscycles.com/products/...addle-ec028205