I bought a second hand DR650 last year, one of the farkles I budgeted for was a better seat, given the reputation of the standard DR seat, I also found I didn't have enough leg room. I got some lowering brackets for the footpegs from Vince Strang in Inverell, and you know what, the seat comfort suddenly improved by about 300%, and I never did get around to getting a better seat. I think a lot of the problem is seating position. While it's no Gold Wing I have covered over 700km without undue discomfort, usually failing light and kangaphobia pulls me up not the dreaded monkey butt. Adventure Moto sell a Seat Concepts kit for your seat, new foam and cover for about $190.00, apparently very popular. There are specialist trimmers around who can custom build a seat for you, one in Goulburn NSW has a very good reputation for seats optimized for your weight, size and riding style.