I'm 6'3 220 lbs. Had trouble with comfort, buffeting, endurance. Could only stand the stock seat for 20 minutes.
Bought the OEM touring seat. Feels a lot higher, its basically the same seat with more padding. Then I had memory foam inserts put in the seat. Now the buffeting was worse because Im sitting higher. Comfort was lots better, but still not great.
Then I read a post about proper seating position. I adjusted my seating position accordingly. A bit better. So, I went back to the stock seat and tried an 8 hour ride. Not bad. Comfort was much better, and zero buffeting.
I'm still trying to teach my body to accept the seating position, but I think thats the problem for most of us. The bike is designed for a bent elbow, bend-at-the-hips seating position, not upright like a SJM.
And the cost is ....zero.