I put a Brooks Champion Flyer (a B-17 with springs) on my tourer. It was pretty great, although after a week of 50-60 mile days my butt had a little pain - not too bad, but it was there.

When I built up an Allez frame for a "fast bike" I tried to stick with more conventional "fast bike looking" stuff. I had a narrow Nashbar seat on it first - it was supposed to be comfortable - but after 30 miles my butt was killing me. Then I tried a Specialized Avatar. I got my sit bones measured and everything. It was a little better, but after 30 it was starting to hurt and by 40 it was getting pretty painful.

I had a century coming up and started to panic. I finally put the Champion Flyer on the Allez the week before the century. What a difference! 45 miles and no pain! I did the century with no pain. After I put the brown Champion Flyer back on my LHT and ordered a black B-17 for the Allez. It has been comfortable right out of the box and I have yet to feel any butt pain, even in back-to-back century weekends. I think it might even be more comfortable than the Champion Flyer! I may have to put it on my LHT before my next tour!

I know a B-17 doesn't work for everyone, but it works for me and my "road bike position."