I've been on quite a few saddles so I'll chime in, but remember that saddle preference is highly individual;

- Dash TT.9 - very comfortable, lots of rotation. Takes a while to get used to the minimal padding, not very suitable or comfy in upright position.
- Dash Strike9 - same as above, quite narrow seating area for aero, lot more comfortable upright.
- ISM Adamo Prologue - Comfortable, I had some chafing/rotation issues, most likely because of the width.
- ISM PN 1.1 - Felt hard.. just couldn't get it right no matter how far forward/backwards.
- ISM PN 2.1 - Very comfortable, good clearance (narrow).
- ISM PN 3.0 - My saddle today. It's quite long & narrow in the front so I can move a little bit back- and forwards on the saddle to find "just the perfect spot". Perhaps a tad harder than the 40's padding ISM's, but overall comfort is extremely good and I get good rotation. No chafing for 90-120 min trainer sessions so far. Can also comfortably sit upright.
- Fizik tritone - Couldn't get it right..

I ride with 15cm drop or so.