RT, I wonder if you're suffering the "too-narrow-saddle blues," too. If you're measuring somewhere between 127-139 I suspect that maybe you also need to move up to the 155.

As far as firm saddles go...when I first started riding my Jett made my sit-bones feel enraged. With time your sit bones will adapt and your rear will toughen and you won't have those discomforts. After my last 2 century rides my sit bones were about the only part of me that didn't hurt.

With a firmer saddle your weight is borne by your sitbones. If you're on a saddle with too much padding, your sitbones can have a tendency to sink-in, then the softer foam or gel padding can be displaced and jam itself into your soft tissues. Better to have some sit bone discomfort than pressure and chafing on your privates.