Thanks for the update NY! I've been looking at these saddles too. As you can see from my sig I also have experience with the inForms and I'm hopeful about the Evoke and Affinity saddles. It seems they get softer with less expensive versions and firmer with more expensive versions; is your understanding too? Also what didn't work with you on the Evoke?
Too bad the shop guy didn't understand your sitbone v saddle width question. You could always go back, re-impress the a$$ometer and measure your sit bone impressions directly. I got the idea that the mm number was a recommended saddle width, not a sit bone measurement. But there are the impressions right there, can't be too hard to measure (even measure a couple times if you like!)
Here's hoping you find a great replacement saddle, and that I can learn from your experiences too.
'09 Trek 7.3 FX hybrid / Jett 155mm
'09 Cervelo P3 TT / looking
'11 Cervelo S3 road / Selle Royal Seta 155mm
Ischial tuberosities: 140mm center to center