I have tried a Brooks Conquest but didn't like it. I much prefer the Champion Flyer which has a wider top, it's a B17 with springs. Mine has stretched a lot though, half an inch in two years, so I can't see it lasting forever.I weigh about the same as you.
My other suspension experiences are a USE SX post, which is good but not entirely lacking in Stiction(MTB speak), so good for ironing out bumps but not small vibratory movements. I also have a Moxey parallelogram post which absorbs both large and small movements, but takes some getting used to and is best for offroad.
Cane Creek do a touring version of this, with a smaller parallelogram which looks an interesting possibility.