Congrats on the new bike! Trek 5200, wow, you don't like to mess around, do you 😉
I would simply ask your local bike store, I'm sure they'll be happy to help. Saddles seem to be very 'personal' things when it comes to fitting, I don't think there is "the" saddle for everybody, it all depends on personal preference.
If I bought a bike like that from somewhere, I would pretty much expect a level of service where they would have no worries swapping the saddle (that is, if you haven't put too many miles on it already), and even to 'test-ride' saddles until you find one that suits you perfectly.
I think my LBS offers that service no matter what bike you got from them (or even, if you didn't buy one from them .. I can't remember the exact details)