Yeah I agree, just test rode an Iron today...Jeez...what's with that seat...like sitting on metal !!! I'm looking at something like the "Cross Bones" seat, but apparently that just won't fit...so now looking for more practical options (that bolt straight on).
What is your definition of best? Can't beat the mustang for comfort. Brawler has had many complaints on the XL. I have the sidekick, basically a two up brawler style seat and it's hot garbage, but it looks good sitting there.
The mustang vintage solo is not a bad looking seat, see attached pic. Stock seat is in sig pic. If you do any serious riding, you'll continue to spend money on seats until you arrive at a mustang or sundowner type seat. I've got seats hanging on the wall, been there done that. You just won't find a low profile seat that provides all day comfort.