Just some thoughts....
A Brooks B68 or B67 would both be substancially wider- thus providing you with a flatter surface. Then your sitbones would take all the weight and your soft parts would be less likely to ride on the nose of the saddle.
And again- the S models are shorter and can't be adjusted forward/backward as much since their rails are about 1 1/2" shorter as well.
If you order your saddle directly from Wallingford there is a great return policy if you don't like the saddle.