I'm having my factory seat reworked by Mean City Cycle. Having them lower the riding position and move it back plus adding memory foam for comfort. It's $110 and alot cheaper then a new one and they have other upgrades that are reasonable to. Worth checking out if you like the look of the stock seat.
Depends on your taste & how much comfort you want ! Wide and comfy I'd go with the mustang touring seat . If you want sleek & not as comfortable go with a sport seat which there is a number of out there including mustang . Pic bellow is the Mustang Vintage Touring seat
Started stock. That sucked. Looks the best though to me.
Then went to a Corbin dual up style. Ugly and expensive, but awesome.
Then went to a mean city cycles modified stock seat, all options, since my Wife got her own bike. Still a bit uncomfortable at 100 plus miles. But good until that 100 miles though.
Then went back to Corbin for a solo. Ugly and expensive but comfortable for 200 miles or so.
I am still searching for cool looking AND comfortable..... Not sure it exists.
The others that most folks talk about such as buttcrack and mustang seem to have the same basic measurements as the Corbin solo. Or at least too close to jump cost wise. I am guessing that those and the Corbin prob ride about the same. But they ARE cheaper. So I would prob go that route instead of Corbin if I was doing it again.
I am most likely not being reasonable in the Looks AND Comfortable part.