I don't know which seat you have fitted at the moment but if you have a low seat and not tried the standard one, I think you will find the standard seat tall enough.
I had an operation a few months ago and a week or so later went for a short ride on my bike and found the standard seat too high and the stretch to the ground seemed much to far after the op. I bought a low seat off a nice chap on this site until I got over the op but have decided to keep it so, my standard seat could be for sale if you need it.
I am 6ft tall by the way and a few years ago owned a BMW GSA1150 with a tall seat and I loved it, I could see over most cars and I had more leg room but I'm sure I couldn't manage that now.
Anyway, if you have a low seat fitted now then I suggest you try the standard one before a high one. Hope this helps.