I have the standard on my R1250 exclusive and it is fine. Had the same on my R1200 triple black. However, the answer to these questions is always very personal and very from person to person, depend on your weight, riding style and other form factors best not described here 😉
On my GSA I tried an airhawk and an alaska leather before I ended up with a Sargent seat.
Just couldn't get comfortable with the stock seat.
Airhawk and Alaska worked for a few miles, but not any sort of distance.
I had a Sargent on my GS also.
Sargent makes a great seat.