I've had my GSR750 supplied by the superb team at Crescent in Verwood for a year now and have found it uncomfortable after about 40 miles riding.
After searching and talking to upholstery companies I decided to go for a total replacement seat from SHAD. The seat has changed a short range streetbike in to a long range sports tourer.
Combined with a Puig screen for wind protection this has made an already great bike even better. The seat is excellent quality and worth the money.