I love the way the Corbins I have owned sit, but I have not been impressed with their quality control or business practices as of late. (I had one on my Katana, and my Ulysses, neither was a good fit, but man they sat great.) I know several vendors that stopped carrying Corbin because they had to go back and forth with them so much to get saddles without QC issues. The tab that goes under the tank on my Katana was off center so that the whole seat mounted skewed to one side by 1/2". The seam in the back of my Buell was so poorly finished, the back rest/rack would not fold flat.
I've also sat on a Corbin on a DRZ, and it was pretty uncomfortable, Lots of forward slope that slid you into the horn at the tank and put an undue amount of pressure on the tail bone.
I put a TPI flat seat on my KLR and although the leather didn't stand up well (the leather on the seam of the horn wore through in a relatively short period of time), the seat overall was quite comfortable. I put several 700 mile days in that saddle.
In the end, the best cure I have found is to spend a couple hundred miles on a proper dirt bike saddle, then go back to riding the KLR. All of sudden, the stock saddle is the most comfortable thing in the world. I road an acquaintance's SXV for 15 minutes, and that thing litterally was trying to split me up the middle. I'm not sure they did anything for padding on that thing, just vinyl wrapped around some frame rails. My DR650se isn't far behind that; after about 30-40 miles, I need a half hour of standing just to get blood flowing again.