Hi, mrv64,
I have the original tall seat on my 06 Uly.
I have to slide my bottom off the seat to put my foot flat on the floor!
(I am 5'8" with 29" inside leg)
I like the height when I ride, it doesn't feel top heavy, and you have, (and are), more visibility.
The best thing about the tall seat, is that you can dangle your legs (long journeys) fully without hitting the floor!
I have not tried the low seat, but remember,
low seat puts your feet closer to the ground,
low seat also lowers your whole body, compared to your feet and arms. (comfort).
I have also heard that it is hotter in the summer, as you're closer to engine??!! (True or false?)
Whatever you choose, good luck!