Another thing to keep in mind is the Corbin is a bit lower than the factory seat. Great for shorter riders, but may be torture on the taller variety (less space between the seat and pegs).
I love my GreatDaytoRide.com-modified stocker.
Look...I've posted this a bunch of times and no one seems to catch on about Corbin's SV650 saddles.
They do offer a "stock" configuration that is about 1" lower than the factory SV seat is when compressed. This is because of how heavily scooped out the shape is.
For NO EXTRA CHARGE Corbin will make your saddle ANY height you wish. I currently have one that is 1" over their stock configuration and it gives me much more leg room (I am 6'1")
I have ridden a Sargent and did not like the "sweet spot", finding it too far back to be comfy.
As to corbin's choice of material for foam, it IS hard but DOES break in after a LOT of miles (my last 3 Corbins have required 2-3K miles before they developed a comfy zone). After that you are good to go for a loooong time.
For the reality that IS Corbin's Customer Service, IT DOES NOT EXIST. As Corbin grew in reputation and size required to meet the market, they terribly neglected the Customer Service aspect. I have had Corbin saddles Lost, sent back with no change made to a problem it was returned for, sent back with tears in the leather, sent back with wrinkles in the leather (my current saddle) and have spent MONTHS dealing with them TRYING to get things right. Sometimes you have to put up with "issues" to get what you want.
If any of you are thinking of buying Corbin and are ordering a taller seat or one with no welts, etc, ASK FOR SERGIO. He is the Manager and WILL do what he can to get the others in line.