Thanks for the thoughts. I'm considering the watch as a commodity that is likely to be replaced regularly and lose a significant portion of value along the way. Thus, I'm less concerned about scratching either the screen or the body, but I am concerned about functionality and will pay extra if there is a functional difference for the 12-18 months it will be in use.
Interesting about feeling on the Ion-X screen. Besides the quality of the feel, is there a difference in responsiveness to touch input?