I'm getting it on my Pearl White as I love the contrast and have the dark rims to match it.
Ditto for me. I have the same config (pearl white + performance gray wheels). I think it looks great.
Regarding the impact on range, if you need to go over 100mph for it to add noticeable downforce wouldn't this also imply the you have to go over 100mph for it to have a tangible impact on range as well? My guess is the impact on range is negligible.