Good luck with the new seat, Guth.
I also have short legs, but long enough to deal with the stock US seat. What's funny is that I bought a tall Tiros-K seat for long distance comfort. The Tiros-K is one of the tallest seat options for the CB1100, but I've found that the big, wide, flat seat allows me to ride all day long in comfort.
I've taken to swapping seats a lot. Day to day, the stock one works fine, but when it's time to go long distances, I give up the ability to flatfoot the bike in favor of posterior comfort.
A big plus is that by swapping back and forth, I'll probably never wear out either seat.