I put the Highlanders on my '04 TBA four months ago. At first they felt as though I had less control, especially in the curves, but after some time I felt comfortable, and now think nothing of the differance. I am also 5'7", my wife is 5'3" and she prefers to keep her '02 TBA in the stock configuration. It kinda depends on your riding style, which is best for you, if you go with the Horns you will be more laid back.
Bob&Amy