I'm not a fan of the overall look (but that says more about font/symbol quality of early Magic than anything else), but I'll almost certainly get a set of Mana symbols (if add-on only orders are possible).

Similarly re pre-Mirrodin aesthetic: The collorless mana symbol (used on the super/win key) is very new as far as Magic goes (introduced 2015), so it also doesn't fit in that old aesthetic.

I think it fits fine where it is and would personally prefer a slightly more modern aesthetic (could the shift key with a current tap symbol be an option?), but if consistency is desired, it shouldn't be there.