Unfortunately, OP, the only sure way to find the right saddle is to try them out. Even if you do all the ass-o-meter stuff, and get the right width, in the end it still comes down to trying a saddle out.

In my saddle quest I must have tried 35 saddles--including many of the saddles people have listed above--and finally settled on an SMP Drakon. But it took a lot of saddles to get there, playing with the angle and placement of each, putting miles on, etc. In the end, I have a saddle that I can ride for 100 miles without the slightest discomfort, and without ever having to get out of the saddle to give my butt a break, so it was worth the effort.

Good luck, and be as systematic about it as you can and you'll also be able to find that saddle that fits your butt like a glove. Er.