Like velonomad, I've toured and commuted exclusively with Brooks sprung saddles. I've used the B17 Champion Flyer as it is a single rail and I use a two bolt post to get the angle how I like it. I've used B66s with a saddle rail sandwich, but couldn't keep the durn thing from squeeking. It annoyed me.
Also consider the effect of tire size and pressure on comfort. Depending upon how light you pack, and many other factors, you may be able to use a wider tire or a little less pressure to soften the ride as well. This doesn't have a weight penalty, but you might be a little slower. Then again, when you're comfortable, you can ride a lot more in a day without the "gotta get there" grindstone thought pattern. Personally, I don't like to tour that way.