Check out Weljo's threads on seats, that guy tried 'em all.
For a lot of folks the rider portion of the seat is a little short, back to front. The SC seat moves the pocket back (and eliminates the forward tilt), but to do that with the stock pan they raise the overall height. Works for some, not for all.
I modified my stock seat using CBrown's posts for guidance. This involves removing the cover, reshaping the stock foam, adding some comfort foam, then re-attaching the cover. That last bit is the only part that is a kinda tough, I borrowed an upholstery stapler from a friend.
It's a $5 Farkle.
It looks stock.
But it's not Carbon Fiber.