Saddles used to be no problem. Then my coonhound whacked my nuts with the tip of his tail and I got epididymis. Made my older saddles obsolete. I found a San Marco SIZE 135 works well on a fast road bike. Firm, substantial cutout.
Now I'm setting up a touring position bike and having a devil of a time finding a saddle that works well with a bit more upright position. The additional weight on the saddle vs. handlebars is tricky. I put my wife's old Sell Ldy moderately cushioned big cutout saddle on. Seems very comfortable on short rides. What problems if any in comfort occur with this type of saddle on say 80 mile rides? Just a different way of riding.
And to the Brooks fans, yeah, I put my Brooks on and toughed it out for a while, but my nuts got more and more painful. So that wasn't working!
That looks great - I'll keep my eyes open for one. Normally I try not to actually buy anything - my junk box usually has enough stuff to keep the fleet going. But saddles are always getting better. The SMP looks like it might be superior for my go-fast bike.
You might also consider using the same position and saddle as on the road bike. There is no rule that says a touring bike position has to be more upright. Some of us don't feel the need for a different position on tour. Something to consider maybe...