I've been through a few..... I have a carbon roadie and a Trek 520 touring bike.

On the touring bike, I had the original stock saddle (which I hated), then switched to a Brooks B-17. Took the brooks on a cross-country after break-in, and it felt fine, but after a few 100-mile-plus days in a row, I began to feel somt of its shortcomings (namely, after one particularly long day, significant numbness in my perineal area). Anyway, I ended up putting the Brooks on my wife's vintage Raleigh Mixte - she loves it and it looks very cool after my rebuild.

Current tourer is a Selle SMP TRK. Great perineal gap, wide enough for long-distance comfort, shaped so that I can change positions for speeds and conditions, and be comfortable all day.

And now for my roadie:
1. Original Masi saddle - 142, kind of padded but not extensively, pretty good saddle but not something I loved. But it works very well for a stock saddle.
2. Switched out for a WTB Pure Race. Decent, but again, not the sweet spot.
3. Went for a Selle Italia Qik (?). Okay, but cutout wasn't what I expected and the shape wasn't quite to my liking.
4.Finally, I tried a Selle SMP Extra (basically the same as the SMP TRK, but only 140 width. This one is a keeper. I do 40-50 milers a couple times a week, it is comfy for those as well as shorter fitness runs (25-mile fast cruise and in-the-drops).

I still love my B17 and maybe I can just adjust it a bit, but now that my wife owns it I dare not try and confiscate. But bottom line, my Selle SMP's seem to be best for me for most conditions.