Sargent seats are awesome - if you get them to do a custom seat on the stock seat pan. I've had 2 of these. Their World Sport seats - i.e. the ones they make on their own seat pan - suck. Maybe not as bad as the stock GS seat, but that ain't saying anything. I've had 1 of their World Sport seats.
'09 R12GS, '05 GSX-R1000
Iron Butt # 4999, WERA/CCS EX # 666 (currently, expired), AMA Life Member
Racer, Drummer, Bassist, Software Engineer