BMof3 -

Assuming you are looking at Brooks and have already talked to Bill (who is a very cool guy!) or Diane (who is a very cool gal!) it comes down to narrowing the ones he recommended.

I had it easy, cuz with my huge sit bones gap there are only a few that will work for me on my upright-bar bike.

Do you ride with your torso at a pretty flat or more upright angle? The more upright, the more you probably want a wider seat in your range.

You can't go wrong with Bill and Wallingford. 6 months is a loooooong trial period!

Pick the 2 or 3 that appeal to you most on a gut level, and post their names here. There are enough Brooks riders on TE that I'm sure you can get reviews of your top choices!